notes2bib (30sep19)

git-svn-id: svn://tug.org/texlive/trunk@52231 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 1177 insertions, 1139 deletions

diff --git a/Master/texmf-dist/source/latex/notes2bib/notes2bib.dtx b/Master/texmf-dist/source/latex/notes2bib/notes2bib.dtx
index b3979b548d6..9e497dd57e4 100644
--- a/Master/texmf-dist/source/latex/notes2bib/notes2bib.dtx
+++ b/Master/texmf-dist/source/latex/notes2bib/notes2bib.dtx
@@ -33,9 +33,9 @@ necessary). LaTeX3, and so `notes2bib`, requires the e-TeX
 extensions: these are available on all modern TeX systems.
 
 Typesetting the documentation requires a number of packages in
-addition to those needed to use the package. This is mainly 
-because of the number of demonstration items included in the 
-text. To compile the documentation without error, you will 
+addition to those needed to use the package. This is mainly
+because of the number of demonstration items included in the
+text. To compile the documentation without error, you will
 need the packages:
  - `csquotes`
  - `helvet`
@@ -65,8 +65,7 @@ See http://www.latex-project.org/lppl.txt
 \endpreamble
 \postamble
 
-Copyright (C) 2007-2011,2013 by
-Copyright (C) 2007-2013 by
+Copyright (C) 2007-2013,2016,2019 by
   Joseph Wright <joseph.wright@morningstar2.co.uk>
 
 It may be distributed and/or modified under the conditions of
@@ -120,348 +119,348 @@ This work consists of the file  notes2bib.dtx
 \end{document}
 %</driver>
 % \fi
-% 
-%\makeatletter 
-% 
-%^^A For creating examples with nice highlighting of code, and so
-%^^A on; based on the system used in the listings source (lstsample).
-%\lst@RequireAspects{writefile}
-%\newsavebox{\LaTeXdemo@box}
-%\lstnewenvironment{LaTeXdemo}[1][code and example]{^^A
-%  \global\let\lst@intname\@empty
-%  \expandafter\let\expandafter\LaTeXdemo@end
-%    \csname LaTeXdemo@#1@end\endcsname
-%  \@nameuse{LaTeXdemo@#1}^^A
-%}{^^A
-%  \LaTeXdemo@end
-%}
-%\newcommand*\LaTeXdemo@new[3]{^^A
-%  \expandafter\newcommand\expandafter*\expandafter
-%    {\csname LaTeXdemo@#1\endcsname}{#2}^^A
-%  \expandafter\newcommand\expandafter*\expandafter
-%    {\csname LaTeXdemo@#1@end\endcsname}{#3}^^A
-%}
-%\newcommand*\LaTeXdemo@common{^^A
-%  \setkeys{lst}{
-%    basicstyle   = \small\ttfamily,
-%    basewidth    = 0.51em,
-%    gobble       = 3,
-%    keywordstyle = \color{blue},
-%    language     = [LaTeX]{TeX},
-%    moretexcs    = {
-%      bibnote       ,
-%      bibnotemark   ,
-%      bibnotesetup  ,
-%      bibnotetext   ,
-%      printbibnotes
-%    }
-%  }^^A 
-%}
-%\newcommand*\LaTeXdemo@input{^^A
-%  \MakePercentComment
-%  \catcode`\^^M=10\relax
-%  \small
-%  \begingroup
-%    \setkeys{lst}{
-%      SelectCharTable=\lst@ReplaceInput{\^\^I}{\lst@ProcessTabulator}
-%    }^^A
-%    \leavevmode 
-%      \input{\jobname.tmp}^^A
-%  \endgroup
-%  \MakePercentIgnore
-%}
-%\LaTeXdemo@new{code and example}{^^A
-%  \setbox\LaTeXdemo@box=\hbox\bgroup
-%    \lst@BeginAlsoWriteFile{\jobname.tmp}^^A
-%    \LaTeXdemo@common
-%}{^^A
-%    \lst@EndWriteFile
-%  \egroup
-%  \begin{center}
-%    \ifdim\wd\LaTeXdemo@box>0.48\linewidth\relax
-%      \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
-%        \begin{minipage}{\linewidth}
-%          \LaTeXdemo@input
-%        \end{minipage}
-%    \else
-%      \begin{minipage}{0.48\linewidth}
-%        \LaTeXdemo@input
-%      \end{minipage}
-%      \hfill
-%      \begin{minipage}{0.48\linewidth}
-%        \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
-%      \end{minipage}
-%    \fi
-%  \end{center}
-%}
-%\LaTeXdemo@new{code only}{^^A
-%  \LaTeXdemo@common
-%}{^^A
-%}
-%
-%\providecommand*\opt[1]{\texttt{#1}}
-%
-%\makeatother
-% 
-%\GetFileInfo{\jobname.sty} 
-% 
-%\changes{v1.0}{2007/08/30}{Initial public release}
-%\changes{v2.0}{2009/09/24}{Second version of package using \pkg{expl3}
-% internally}
-%
-%\title{^^A
-%  \pkg{notes2bib} --- Integrating notes into the bibliography^^A
-%    \thanks{^^A
-%      This file describes version \fileversion, last revised 
-%      \filedate.^^A
-%    }^^A
-%}
-%\author{^^A
-%  Joseph Wright\thanks{E-mail: joseph.wright@morningstar2.co.uk}^^A
-%}
-%\date{Released \filedate}
-%
-%\maketitle
-%
-%\begin{abstract}
-% The \pkg{notes2bib} package defines a new type of note, \cs{bibnote}, 
-% which will always be added to the bibliography. The package allows
-% footnotes and endnotes to be moved into the bibliography in the same
-% way.  The package can be used with \pkg{natbib} and \pkg{biblatex} as
-% well as plain LaTeX citations. Both sorted and unsorted bibliography 
-% styles are supported.
-%\end{abstract}
-%
-%\tableofcontents
-%
-%\begin{documentation}
-%
-%\section{Introduction}
+%
+% \makeatletter
+%
+% ^^A For creating examples with nice highlighting of code, and so
+% ^^A on; based on the system used in the listings source (lstsample).
+% \lst@RequireAspects{writefile}
+% \newsavebox{\LaTeXdemo@box}
+% \lstnewenvironment{LaTeXdemo}[1][code and example]{^^A
+%   \global\let\lst@intname\@empty
+%   \expandafter\let\expandafter\LaTeXdemo@end
+%     \csname LaTeXdemo@#1@end\endcsname
+%   \@nameuse{LaTeXdemo@#1}^^A
+% }{^^A
+%   \LaTeXdemo@end
+% }
+% \newcommand*\LaTeXdemo@new[3]{^^A
+%   \expandafter\newcommand\expandafter*\expandafter
+%     {\csname LaTeXdemo@#1\endcsname}{#2}^^A
+%   \expandafter\newcommand\expandafter*\expandafter
+%     {\csname LaTeXdemo@#1@end\endcsname}{#3}^^A
+% }
+% \newcommand*\LaTeXdemo@common{^^A
+%   \setkeys{lst}{
+%     basicstyle   = \small\ttfamily,
+%     basewidth    = 0.51em,
+%     gobble       = 4,
+%     keywordstyle = \color{blue},
+%     language     = [LaTeX]{TeX},
+%     moretexcs    = {
+%       bibnote       ,
+%       bibnotemark   ,
+%       bibnotesetup  ,
+%       bibnotetext   ,
+%       printbibnotes
+%     }
+%   }^^A
+% }
+% \newcommand*\LaTeXdemo@input{^^A
+%   \MakePercentComment
+%   \catcode`\^^M=10\relax
+%   \small
+%   \begingroup
+%     \setkeys{lst}{
+%       SelectCharTable=\lst@ReplaceInput{\^\^I}{\lst@ProcessTabulator}
+%     }^^A
+%     \leavevmode
+%       \input{\jobname.tmp}^^A
+%   \endgroup
+%   \MakePercentIgnore
+% }
+% \LaTeXdemo@new{code and example}{^^A
+%   \setbox\LaTeXdemo@box=\hbox\bgroup
+%     \lst@BeginAlsoWriteFile{\jobname.tmp}^^A
+%     \LaTeXdemo@common
+% }{^^A
+%     \lst@EndWriteFile
+%   \egroup
+%   \begin{center}
+%     \ifdim\wd\LaTeXdemo@box>0.48\linewidth\relax
+%       \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
+%         \begin{minipage}{\linewidth}
+%           \LaTeXdemo@input
+%         \end{minipage}
+%     \else
+%       \begin{minipage}{0.48\linewidth}
+%         \LaTeXdemo@input
+%       \end{minipage}
+%       \hfill
+%       \begin{minipage}{0.48\linewidth}
+%         \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
+%       \end{minipage}
+%     \fi
+%   \end{center}
+% }
+% \LaTeXdemo@new{code only}{^^A
+%   \LaTeXdemo@common
+% }{^^A
+% }
+%
+% \providecommand*\opt[1]{\texttt{#1}}
+%
+% \makeatother
+%
+% \GetFileInfo{\jobname.sty}
+%
+% \changes{v1.0}{2007/08/30}{Initial public release}
+% \changes{v2.0}{2009/09/24}{Second version of package using \pkg{expl3}
+%  internally}
+%
+% \title{^^A
+%   \pkg{notes2bib} --- Integrating notes into the bibliography^^A
+%     \thanks{^^A
+%       This file describes version \fileversion, last revised
+%       \filedate.^^A
+%     }^^A
+% }
+% \author{^^A
+%   Joseph Wright\thanks{E-mail: joseph.wright@morningstar2.co.uk}^^A
+% }
+% \date{Released \filedate}
+%
+% \maketitle
+%
+% \begin{abstract}
+%   The \pkg{notes2bib} package defines a new type of note, \cs{bibnote},
+%   which will always be added to the bibliography. The package allows
+%   footnotes and endnotes to be moved into the bibliography in the same
+%   way.  The package can be used with \pkg{natbib} and \pkg{biblatex} as
+%   well as plain \LaTeX{} citations. Both sorted and unsorted bibliography
+%   styles are supported.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \begin{documentation}
+%
+ %\section{Introduction}
 %
 % In most subject areas, bibliographic citations and notes are
 % separate entities. However, in some parts of the physical sciences
 % (chemistry and physics) it is usual for references to the
 % literature and notes to be given together in a \enquote{References and
-% Notes} section.  By default, this requires that \BibTeX\ users
+% Notes} section.  By default, this requires that \BibTeX{} users
 % create a notes database for each document that they write. This is
 % also true if complex references are needed, which cannot be handled
 % automatically.
-% 
+%
 % The aim of the \pkg{notes2bib} package is to make integration of notes
 % into the bibliography easy.  Notes can be written as normal in the
-% LaTeX source, and are automatically moved to the bibliography. The 
-% package is compatible with sorted and unsorted bibliography styles. 
-% The package has been designed for use with numerical citations, 
+% \LaTeX{} source, and are automatically moved to the bibliography. The
+% package is compatible with sorted and unsorted bibliography styles.
+% The package has been designed for use with numerical citations,
 % although it will work with other systems.
-% 
-%\section{Installation}
 %
-%\changes{v2.0b}{2010/01/08}{Better documentation for unpacking and
-%  installation}
+% \section{Installation}
+%
+% \changes{v2.0b}{2010/01/08}{Better documentation for unpacking and
+%   installation}
 % The package is supplied in \file{dtx} format and as a pre-extracted
 % zip file, \file{\jobname.tds.zip}. The later is most convenient for
 % most users: simply unzip this in your local texmf directory and
 % run \texttt{texhash} to update the database of file locations. If
-% you want to unpack the \file{dtx} yourself, running 
+% you want to unpack the \file{dtx} yourself, running
 % \texttt{tex \jobname.dtx} will extract the package whereas
 % \texttt{latex \jobname.dtx} will extract it and also typeset the
 % documentation.
 %
-% The package requires LaTeX3 support as provided in the 
+% The package requires \LaTeX3 support as provided in the
 % \pkg{l3kernel} and \pkg{l3packages} bundles. Both of these are available
 % on \href{http://www.ctan.org}{\textsc{ctan}} as ready-to-install
 % zip files. Suitable versions are available in MiKTeX 2.9 and
 % TeX Live 2011 (updating the relevant packages online may be
-% necessary). LaTeX3, and so \pkg{notes2bib}, requires the e-TeX 
-% extensions: these are available on all modern \TeX\ systems.
-% 
+% necessary). \LaTeX3, and so \pkg{notes2bib}, requires the e-\TeX{}
+% extensions: these are available on all modern \TeX{} systems.
+%
 % Typesetting the documentation requires a number of packages in
-% addition to those needed to use the package. This is mainly 
+% addition to those needed to use the package. This is mainly
 % because of the number of demonstration items included in the text. To
 % compile the documentation without error, you will need the packages:
 % \begin{itemize}
-% \item \pkg{csquotes}
-% \item \pkg{helvet}
-% \item \pkg{mathpazo}
-% \item \pkg{listings}
-%\end{itemize}
+%   \item \pkg{csquotes}
+%   \item \pkg{helvet}
+%   \item \pkg{mathpazo}
+%   \item \pkg{listings}
+% \end{itemize}
 %
-%\section{Using the package}
+% \section{Using the package}
 %
-% The package should be loaded as normal in the preamble. The package 
+% The package should be loaded as normal in the preamble. The package
 % recognises a number of options, which can also be used in teh document
 % body. These are described later in this document.
-%\begin{LaTeXdemo}[code only]
-%  \usepackage[<options>]{notes2bib}
-%\end{LaTeXdemo}
-%
-%\DescribeMacro {\bibnote}
-%\begin{syntax}
-%  \cs{bibnote} \oarg{name} \marg{text}
-%\end{syntax}
+% \begin{LaTeXdemo}[code only]
+%   \usepackage[<options>]{notes2bib}
+% \end{LaTeXdemo}
+%
+% \DescribeMacro {\bibnote}
+% \begin{syntax}
+%   \cs{bibnote} \oarg{name} \marg{text}
+% \end{syntax}
 % The basic function provided by \pkg{notes2bib} is the \cs{bibnote}
 % macro. This is used in exactly the same way as footnotes, taking
-% a mandatory argument, the \meta{text} of the note, and an optional 
+% a mandatory argument, the \meta{text} of the note, and an optional
 % argument, a \meta{name} for the note. The \meta{text} will be saved to
-% a \BibTeX\ database file for later inclusion in the bibliography, and
-% a reference will be placed in the body text at the position of the 
+% a \BibTeX{} database file for later inclusion in the bibliography, and
+% a reference will be placed in the body text at the position of the
 % note.
-%\begin{LaTeXdemo}
-%  A very simple example of a bibliography note
-%  \bibnote{Note for the first example}.
-%\end{LaTeXdemo}
-% When used without the optional \meta{name} argument, each note is 
+% \begin{LaTeXdemo}
+%   A very simple example of a bibliography note
+%   \bibnote{Note for the first example}.
+% \end{LaTeXdemo}
+% When used without the optional \meta{name} argument, each note is
 % given an automatically-generated name. If notes need to be referred to
-% again in a document, the optional argument avoids the need to 
+% again in a document, the optional argument avoids the need to
 % understand the detail of the automated system.
-%\begin{LaTeXdemo}
-%  An example of a named note \bibnote[labelled]{Note for the second 
-%  example}. The text can then continue and reference the note again 
-%  later \bibnotemark[labelled].
-%\end{LaTeXdemo}
+% \begin{LaTeXdemo}
+%   An example of a named note \bibnote[labelled]{Note for the second
+%   example}. The text can then continue and reference the note again
+%   later \bibnotemark[labelled].
+% \end{LaTeXdemo}
 %
 % Verbatim text cannot be added directly to notes (in the same way that
 % it cannot be used in footnotes). This means that the normal care
-% will be needed with verbatim-like material. 
-%\begin{LaTeXdemo}
-%  The next note contains some awkward text
-%  \bibnote{Some \texttt{\textbackslash verb}-like output}.
-%\end{LaTeXdemo}
-%
-%\DescribeMacro {\bibnotemark}
-%\begin{syntax}
-%  \cs{bibnotemark} \oarg{name} 
-%\end{syntax} 
-%\DescribeMacro \bibnotetext
-%\begin{syntax}
-%  \cs{bibnotetext} \oarg{name} \marg{text}
-%\end{syntax} 
+% will be needed with verbatim-like material.
+% \begin{LaTeXdemo}
+%   The next note contains some awkward text
+%   \bibnote{Some \texttt{\textbackslash verb}-like output}.
+% \end{LaTeXdemo}
+%
+% \DescribeMacro {\bibnotemark}
+% \begin{syntax}
+%   \cs{bibnotemark} \oarg{name}
+% \end{syntax}
+% \DescribeMacro \bibnotetext
+% \begin{syntax}
+%   \cs{bibnotetext} \oarg{name} \marg{text}
+% \end{syntax}
 % In common with \cs{footnote}, the basic \cs{bibnote} macro has
 % companion macros \cs{bibnotemark} and \cs{bibnotetext}. In contrast
-% to the LaTeX2e kernel \cs{footnote} macro, \cs{bibnote} is naturally
+% to the \LaTeXe{} kernel \cs{footnote} macro, \cs{bibnote} is naturally
 % robust and so \cs{bibnotemark} and \cs{bibnotetext} should be needed
 % much more rarely than the \cs{footnote} versions.
-% 
+%
 % As with the related \cs{footnote} functions, \cs{bibnotemark} can be
-% used alone or will recognise an optional argument giving the 
-% \meta{name} of the note. \cs{bibnotetext} also recognises the same 
+% used alone or will recognise an optional argument giving the
+% \meta{name} of the note. \cs{bibnotetext} also recognises the same
 % optional \meta{name} argument as well as the mandatory \meta{text}.
-%\begin{LaTeXdemo}
-%  A note without a name \bibnotemark\ can be given with some
-%  text \bibnotetext{Text for the fourth example}. Note can also be
-%  given names \bibnotemark[named], which are then used for the
-%  text\bibnotetext[named]{More text for the fourth example}.
-%\end{LaTeXdemo}
+% \begin{LaTeXdemo}
+%   A note without a name \bibnotemark{} can be given with some
+%   text \bibnotetext{Text for the fourth example}. Note can also be
+%   given names \bibnotemark[named], which are then used for the
+%   text\bibnotetext[named]{More text for the fourth example}.
+% \end{LaTeXdemo}
 %
 % The \cs{bibnotemark} macro can also be used to cross-reference notes
-% given earlier in the document. This method is preferred for 
-% referencing notes over using the \cs{cite} macro as 
+% given earlier in the document. This method is preferred for
+% referencing notes over using the \cs{cite} macro as
 % \cs{bibnotemark} will cope correctly with out-of-order notes
 % (see Section~\ref{out-of-order}).
-%\begin{LaTeXdemo}
-%  See notes \bibnotemark[labelled] and \bibnotemark[named].
-%\end{LaTeXdemo}
-%
-%\DescribeMacro {\printbibnotes}
-%\begin{syntax}
-%  \cs{printbibnotes}
-%\end{syntax}
+% \begin{LaTeXdemo}
+%   See notes \bibnotemark[labelled] and \bibnotemark[named].
+% \end{LaTeXdemo}
+%
+% \DescribeMacro {\printbibnotes}
+% \begin{syntax}
+%   \cs{printbibnotes}
+% \end{syntax}
 % In most cases, there will be both notes and references in a document.
-% The notes will be printed along with cited literature in the 
+% The notes will be printed along with cited literature in the
 % bibliography, produced using the \cs{bibliography} macro (or
-% \cs{printbibliography} when using \pkg{biblatex}). However, it is 
+% \cs{printbibliography} when using \pkg{biblatex}). However, it is
 % possible to print only the notes in a document using the
 % \cs{printbibnotes} macro.
 % \bibliographystyle{unsrt}
-%\begin{LaTeXdemo}
-%  \printbibnotes
-%\end{LaTeXdemo}
-%
-%\DescribeMacro {\bibnotesetup}
-%\begin{syntax}
-%  \cs{bibnotesetup} \marg{key--value list}
-%\end{syntax}
+% \begin{LaTeXdemo}
+%   \printbibnotes
+% \end{LaTeXdemo}
+%
+% \DescribeMacro {\bibnotesetup}
+% \begin{syntax}
+%   \cs{bibnotesetup} \marg{key--value list}
+% \end{syntax}
 % The behaviour of \pkg{notes2bib} can be altered by setting one or
-% more package options. These are given as arguments to the 
+% more package options. These are given as arguments to the
 % \cs{bibnotesetup} function, which takes a \meta{key--value list} and
 % uses this to set up the package. With the exception of the
 % \opt{file-name} option, all of the settings can be altered in the
 % preamble or the document body. The various package options are
 % described below.
 %
-%\subsection{Auto-generated note names}
+% \subsection{Auto-generated note names}
 %
-%\DescribeOption {note-name}
-% When no explicit label is given for a note, one is generated 
+% \DescribeOption {note-name}
+% When no explicit label is given for a note, one is generated
 % automatically by the package. This consists of two parts, a name and
-% a number. The text of the name can be set up using the 
-% \opt{note-name} option. This should not contain any spaces, as 
-% \BibTeX\ does not support records with spaces in names. The numerical
+% a number. The text of the name can be set up using the
+% \opt{note-name} option. This should not contain any spaces, as
+% \BibTeX{} does not support records with spaces in names. The numerical
 % part of the label is always generated automatically, and is the
 % number of the note. The standard setting for \opt{note-name} is
 % \opt{Note}.
-% 
-%\DescribeOption {refsection-name} 
-%\DescribeOption {refsection-separator} 
+%
+% \DescribeOption {refsection-name}
+% \DescribeOption {refsection-separator}
 % When using \pkg{biblatex}'s \texttt{refsection} system, additional
 % information is added to all labels from the second \texttt{refsection}
 % onward (\emph{i.e.}~to all except \texttt{refsection} 0). This
 % additional text is added before the note name, and always includes the
 % \texttt{refsection} number. The settings \opt{refsection-name} and
-% \opt{refsection-separator} determine the exact text added: 
+% \opt{refsection-separator} determine the exact text added:
 % \opt{refsection-name} comes before the \texttt{refsection} number and
 % has default \opt{Refsection}, while \opt{refsection-separator} comes
 % after it and has default value \opt{-}.
 %
-%\subsection{Underlying citation system}
+% \subsection{Underlying citation system}
 %
-%\DescribeOption {cite-function}
+% \DescribeOption {cite-function}
 % \pkg{notes2bib} works by making the text of notes into citations.
 % To do this, each note has to be \enquote{cited} in the appropriate
-% place. \pkg{notes2bib} does not carry out any low-level citation 
+% place. \pkg{notes2bib} does not carry out any low-level citation
 % itself: instead, a general citation macro is called. The nature of
 % the function is set up using the \opt{cite-function} option,
 % which should be set to a citation macro taking one mandatory
 % argument. The initial setting is \opt{cite-function = \cs{cite}}.
 %
-%\subsection{Controlling the temporary database}
-% 
-%\DescribeOption {file-name}
+% \subsection{Controlling the temporary database}
+%
+% \DescribeOption {file-name}
 % The file name used for the database of notes is set using the
 % \opt{file-name} option. The standard setting is to call the file
 % |notes2bib-\jobname|, which may not be appropriate (for example, file
-% names containing spaces may be problematic). Setting the 
-% \opt{file-name} option will alter the name of the file, with the 
+% names containing spaces may be problematic). Setting the
+% \opt{file-name} option will alter the name of the file, with the
 % file extension fixed as \file{bib}. In contrast to the other package
 % options, this value can only be set in the preamble.
-% 
-%\DescribeOption {record-type} 
-% Each note is written to the database as a standard \BibTeX\ record.
+%
+% \DescribeOption {record-type}
+% Each note is written to the database as a standard \BibTeX{} record.
 % The type of record created is set using the \opt{record-type}
 % option. Usually, this will be set to \opt{misc}; \pkg{biblatex} v1.1a
 % upwards provides the \opt{bibnote} record type, and this is used if
-% available. Some \BibTeX\ styles have dedicated support for notes: if
+% available. Some \BibTeX{} styles have dedicated support for notes: if
 % so, the appropriate value should be set for this option.
-% 
-%\DescribeOption {note-field} 
+%
+% \DescribeOption {note-field}
 % The database field used to store the text of the note is available
-% for change \emph{via} the \opt{note-field} option. The standard 
+% for change \emph{via} the \opt{note-field} option. The standard
 % setting is \opt{note}.
 %
-%\DescribeOption {keyword-entry} 
-% Some styles (most notably \pkg{biblatex}) recognise keywords in 
-% \BibTeX\ records, stored in a \texttt{keywords} field. To allow the 
+% \DescribeOption {keyword-entry}
+% Some styles (most notably \pkg{biblatex}) recognise keywords in
+% \BibTeX{} records, stored in a \texttt{keywords} field. To allow the
 % selective printing of notes, \pkg{notes2bib} includes a keyword in
 % each note record. The keyword is set using the \opt{keyword-entry}
 % option: the standard setting is \opt{note}.
 %
-%\subsection{Ordering notes in relation to citations}
-%\label{out-of-order}
+% \subsection{Ordering notes in relation to citations}
+% \label{out-of-order}
 %
-%\DescribeOption {placement}
+% \DescribeOption {placement}
 % The standard method used by \pkg{notes2bib} places notes into the
 % bibliography with no particular control of the relative position of
-% notes with respect to citations. For unsorted bibliography styles, 
+% notes with respect to citations. For unsorted bibliography styles,
 % this will result in the notes appearing mixed in with citations.
 % However, \pkg{notes2bib} can create notes so that they appear before
 % or after citations, with both sorted an unsorted bibliography styles.
@@ -471,118 +470,118 @@ This work consists of the file  notes2bib.dtx
 % the \opt{after} setting forcing notes to appear after citation.
 % The standard setting is \opt{placement = mixed}, which will result
 % in mixing of notes and citations.
-% 
+%
 % When notes are placed in the bibliography without any change of order,
 % it is possible to cross-reference to them using the standard \cs{cite}
 % macro. However, when notes are out of the normal order this can lead
 % to problems. These can be avoided by using the \cs{bibnotemark} macro
 % to cross-reference notes. As this method will always work correctly,
-% it is the recommended method for referencing notes under all 
+% it is the recommended method for referencing notes under all
 % circumstances.
-% 
-%\DescribeOption {presort-before} 
-%\DescribeOption {presort-mixed} 
-%\DescribeOption {presort-after} 
-%\DescribeOption {sort-key-before} 
-%\DescribeOption {sort-key-mixed} 
-%\DescribeOption {sort-key-after} 
+%
+% \DescribeOption {presort-before}
+% \DescribeOption {presort-mixed}
+% \DescribeOption {presort-after}
+% \DescribeOption {sort-key-before}
+% \DescribeOption {sort-key-mixed}
+% \DescribeOption {sort-key-after}
 % There are a number of different mechanisms used by \pkg{notes2bib} to
-% achieve the desired ordering. Most standard \BibTeX\ styles recognise
+% achieve the desired ordering. Most standard \BibTeX{} styles recognise
 % a \texttt{key} field, which can be used to override sorting by author
 % or title. This is used by \pkg{notes2bib}, with the note name prefixed
-% by a string to force the sort order. The appropriate strings are 
+% by a string to force the sort order. The appropriate strings are
 % stored using the options \opt{sort-key-before}, \opt{sort-key-mixed}
 % and \opt{sort-key-after}. These have standard settings
-% \opt{aaa}, \opt{\meta{blank}} and \opt{zzz}, respectively. When the 
+% \opt{aaa}, \opt{\meta{blank}} and \opt{zzz}, respectively. When the
 % \pkg{biblatex} package is in use, a more powerful method is available
 % to control sorting: the \texttt{presort} field. Data to be written
-% to this field is set up using the \opt{presort-before}, 
-% \opt{presort-mixed} and \opt{presort-after} options. Here, the 
+% to this field is set up using the \opt{presort-before},
+% \opt{presort-mixed} and \opt{presort-after} options. Here, the
 % standard values are \opt{ml}, \opt{mm} and \opt{mn}, respectively.
-% These standard values will probably be appropriate in almost all 
+% These standard values will probably be appropriate in almost all
 % cases.
-% 
-%\subsection{Converting footnotes and endnotes}
 %
-%\DescribeOption {convert-endnotes}
-%\DescribeOption {convert-footnotes}
+% \subsection{Converting footnotes and endnotes}
+%
+% \DescribeOption {convert-endnotes}
+% \DescribeOption {convert-footnotes}
 % It is possible to convert both \cs{footnote} and \cs{endnote}
 % entries in a file into \cs{bibnote} entries in a flexible manner.
 % This behaviour is controlled using the \opt{convert-endnotes} and
 % \opt{convert-footnotes} options; both recognise the values
 % \opt{true} and \opt{false}. The original definitions for the
-% appropriate macros are stored by \pkg{notes2bib}, and so it is 
+% appropriate macros are stored by \pkg{notes2bib}, and so it is
 % possible to switch this behaviour on and off.
-% 
-%\DescribeMacro {\thanks} 
+%
+% \DescribeMacro {\thanks}
 % The package is designed so that converting footnotes to bibliographic
 % notes will not affect the \cs{thanks} macro. Thus the option
 % \opt{convert-footnotes = true} can be given before \cs{maketitle}
 % with no implication for and \cs{thanks}.
-% 
-%\subsection{Using unsorted bibliography styles}
 %
-%\changes{v2.0b}{2010/01/08}{Improvements to details concerning
-%  \opt{use-sort-key} option}
-%\DescribeOption {use-sort-key}
-% Some bibliography styles (most notably those using the 
+% \subsection{Using unsorted bibliography styles}
+%
+% \changes{v2.0b}{2010/01/08}{Improvements to details concerning
+%   \opt{use-sort-key} option}
+% \DescribeOption {use-sort-key}
+% Some bibliography styles (most notably those using the
 % author--date system) may not work well with the settings
-% of the package as supplied. Some of the data written by 
-% \pkg{notes2bib} can be misunderstood by styles such as 
+% of the package as supplied. Some of the data written by
+% \pkg{notes2bib} can be misunderstood by styles such as
 % \file{unsrtnat}. To suppress creating a \texttt{key} field in the
 % database, the option \opt{use-sort-key} should be set to \opt{false}
 % with these problematic styles. At the same time, it may be necessary
 % to alter the \opt{note-name} option to a blank value.
-%\begin{LaTeXdemo}[code only]
-%  \bibnotesetup{
-%    note-name    = ,
-%    use-sort-key = false
-%  }
-%\end{LaTeXdemo} 
-% 
-%\section{Data written to the \texttt{aux} file}
-% 
+% \begin{LaTeXdemo}[code only]
+%   \bibnotesetup{
+%     note-name    = ,
+%     use-sort-key = false
+%   }
+% \end{LaTeXdemo}
+%
+% \section{Data written to the \texttt{aux} file}
+%
 % \pkg{notes2bib} writes some information to the \file{aux} file, so
-% that it is available between runs. The functions added to the 
+% that it is available between runs. The functions added to the
 % file are not needed directly by the user, but are documented here
 % for completeness. However, it may be necessary to worry about the
 % \file{aux} file when splitting bibliographies.
-% 
-%\DescribeMacro {\recordnotes}
+%
+% \DescribeMacro {\recordnotes}
 % \begin{syntax}
 %   \cs{recordnotes}
 % \end{syntax}
-% When notes are placed out-of-order in in a document (using 
+% When notes are placed out-of-order in in a document (using
 % \opt{placement = before} or \opt{placement = after}) \pkg{notes2bib}
 % has to record information in the current \file{aux} file. When using
 % multiple bibliographies, this will not necessarily happen totally
-% automatically. To force \pkg{notes2bib} to write the current 
+% automatically. To force \pkg{notes2bib} to write the current
 % out-of-order notes to the \file{aux} file, the macro
 % \cs{recordnotes} is available. It should be used immediately
 % before changing between auxiliary files.
-% 
-%\DescribeMacro {\TotalNotes}
-%\begin{syntax}
-%  \cs{TotalNotes} \marg{number}
-%\end{syntax}
-% Records the total number of auto-numbered notes in a run. This 
-% information is needed to check if zero-filling is needed for the
-% numbers used.
-% 
-%\DescribeMacro {\NotesAfterCitations}
+%
+% \DescribeMacro {\TotalNotes}
 % \begin{syntax}
-%   \cs{NotesAfterCitations} \marg{note-list}
+%   \cs{TotalNotes} \marg{number}
 % \end{syntax}
-%\DescribeMacro {\NotesBeforeCitations}
+% Records the total number of auto-numbered notes in a run. This
+% information is needed to check if zero-filling is needed for the
+% numbers used.
+%
+% \DescribeMacro {\NotesAfterCitations}
+%  \begin{syntax}
+%    \cs{NotesAfterCitations} \marg{note-list}
+%  \end{syntax}
+% \DescribeMacro {\NotesBeforeCitations}
 % \begin{syntax}
 %   \cs{NotesBeforeCitations} \marg{note-list}
 % \end{syntax}
 % These functions record the notes which have been placed outside of
 % the normal order by the package. This information is used to check
-% for changes in note order between LaTeX runs, so that the need for
-% re-running LaTeX and BibTeX can be detected.
-% 
-%\section{Notes for upgrading from version one}
+% for changes in note order between \LaTeX{} runs, so that the need for
+% re-running \LaTeX{} and \BibTeX{} can be detected.
+%
+% \section{Notes for upgrading from version one}
 %
 % Documents which compile with version one of \pkg{notes2bib} should
 % work equally well with version two. The package recognises the
@@ -590,1056 +589,1019 @@ This work consists of the file  notes2bib.dtx
 % are not documented here as all new documents should use the improved
 % structures provided here. As some auxiliary file functions have been
 % altered, it may be necessary to delete \file{aux} files for documents
-% processed initially with older versions of \pkg{notes2bib}. 
-%
-%\end{documentation}
-%
-%\begin{implementation}
-%
-%\section{Implementation}
-%
-%\changes{v2.0a}{2009/11/01}{Changed all \cs{cs_set:Nn}, \emph{etc}.\
-%  to \cs{cs_set:Npn}, \emph{etc}.\ to match \pkg{expl3} changes}
-%\changes{v2.0b}{2010/01/09}{A few missed \cs{cs_set:Nn}, \cs{cs_set:Nx}, 
-%  \emph{etc}.\ changed}
-%\changes{v2.0b}{2010/01/09}{Reformatted code to reflect style settled
-%  on by LaTeX3 Project}
-%\changes{v2.0c}{2010/02/09}{Switch from \cs{iow_space:} to
-%  \cs{c_space_tl}}
-%\changes{v2.0c}{2010/02/09}{Collect all notes into a token register
-%  and write in one go to file (using a pooled stream)}
-%\changes{v2.0c}{2010/02/09}{Items \cs{AtBeginDocument} and
-%  \cs{AtEndDocument} now set up directly (no functions needed) 
-%  unless the function is required for other reasons}
-%\changes{v2.0c}{2010/03/30}{Make internal functions protected}
-%\changes{v2.0c}{2010/03/30}{Change token registers to token list
-%  variables}
-%\changes{v2.0g}{2011/06/30}{Switch from \cs{intexpr_\ldots} to 
-%  \cs{int_\ldots} functions}
-%\changes{v2.0j}{2012/11/07}{Change internal prefix}
+% processed initially with older versions of \pkg{notes2bib}.
+%
+% \section{Code-level interfaces}
+%
+% In common with other \LaTeX3 modules, \pkg{notes2bib} makes functionality
+% available at a code (\cs{ExplSyntaxOn}) level. End users \emph{do not}
+% need to read this section!
+%
+% Programmers should note that \pkg{notes2bib} uses the module prefix
+% \texttt{notestobib}, but that the options use the \pkg{l3keys} module
+% name \texttt{notes2bib}.
+%
+% \begin{function}{\notestobib_write_note:nn, \notestobib_write_note:xn}
+%   \begin{syntax}
+%     \cs{notestobib_write_note:nn} \marg{note} \marg{text}
+%   \end{syntax}
+%   Adds the \meta{text} for the \meta{note} to the dynamic database
+%   created by \pkg{notes2bib}. Note that the \meta{note} name should be
+%   unique and that the writing operation is delayed by the package until
+%   either the end of the document or an explicit write request.
+% \end{function}
+%
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{Implementation}
 %
 %    \begin{macrocode}
 %<*package>
 %    \end{macrocode}
-%    
+%
 %    \begin{macrocode}
 %<@@=notestobib>
 %    \end{macrocode}
 %
 % Version data to start with.
 %    \begin{macrocode}
-\ProvidesExplPackage
-  {notes2bib} {2013/07/11} {2.0k}
+\ProvidesExplPackage {notes2bib} {2019-09-28} {2.0m}
   {Integrating notes into the bibliography}
 \RequirePackage{l3keys2e}
-%    \end{macrocode} 
-%    
-%\subsection{Variables and constants}
-%
-%\begin{macro}{\c_@@_file_message_tl}
-% A short piece of text that is added to the top of an auto-generated
-% file. Setting this up as a constant means that it can be changed
-% (for example for translation) if necessary.
+%    \end{macrocode}
+%
+% \subsection{Variables and constants}
+%
+% \begin{macro}{\c_@@_file_message_tl}
+%   A short piece of text that is added to the top of an auto-generated
+%   file. Setting this up as a constant means that it can be changed
+%   (for example for translation) if necessary.
 %    \begin{macrocode}
-\tl_new:N \c_@@_file_message_tl
-\tl_set:Nn \c_@@_file_message_tl {
-  \iow_char:N \% ~
-  This~is~an~auxiliary~file~used~by~the~'notes2bib'~package.
-    \iow_newline:
-  \iow_char:N \% ~
-  This~file~may~safely~be~deleted.
-    \iow_newline:
-  \iow_char:N \% ~
-  It~will~be~recreated~as~required.
-    \iow_newline:
-}
+\tl_const:Nn \c_@@_file_message_tl
+  {
+    \iow_char:N \% ~
+    This~is~an~auxiliary~file~used~by~the~'notes2bib'~package.
+      \iow_newline:
+    \iow_char:N \% ~
+    This~file~may~safely~be~deleted.
+      \iow_newline:
+    \iow_char:N \% ~
+    It~will~be~recreated~as~required.
+      \iow_newline:
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_after_clist}
-%\begin{macro}{\g_@@_before_clist}
-% Notes to be placed either before or after citations need to be tracked
-% by the module. Simple comma lists will achieve this.
+% \begin{macro}{\g_@@_after_clist, \g_@@_before_clist}
+%   Notes to be placed either before or after citations need to be tracked
+%   by the module. Simple comma lists will achieve this.
 %    \begin{macrocode}
 \clist_new:N \g_@@_after_clist
 \clist_new:N \g_@@_before_clist
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_all_after_clist}
-%\begin{macro}{\g_@@_all_before_clist}
-% As notes after citations can be flushed, there is a need for a second
-% list which is never emptied.
+% \begin{macro}{\g_@@_all_after_clist, \g_@@_all_before_clist}
+%   As notes after citations can be flushed, there is a need for a second
+%   list which is never emptied.
 %    \begin{macrocode}
 \clist_new:N \g_@@_all_after_clist
 \clist_new:N \g_@@_all_before_clist
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_note_int}
-% A counter for the automatically-created notes is needed. This is a
-% global value (life will get very complicated if not).
+% \begin{macro}{\g_@@_note_int}
+%   A counter for the automatically-created notes is needed. This is a
+%   global value (life will get very complicated if not).
 %    \begin{macrocode}
 \int_new:N \g_@@_note_int
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\l_@@_presort_tl}
-%\begin{macro}{\l_@@_sortkey_tl}
-% The text used for sorting citations is stored here: it is never set
-% directly, as it depends on the type of sorting taking place.
+% \begin{macro}{\l_@@_presort_tl, \l_@@_sortkey_tl}
+%   The text used for sorting citations is stored here: it is never set
+%   directly, as it depends on the type of sorting taking place.
 %    \begin{macrocode}
 \tl_new:N \l_@@_presort_tl
 \tl_new:N \l_@@_sortkey_tl
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_previous_after_clist}
-%\begin{macro}{\g_@@_previous_before_clist}
-% For comparison purposes, the lists of out-of-order notes from the
-% previous LaTeX run are needed.
+% \begin{macro}{\g_@@_previous_after_clist, \g_@@_previous_before_clist}
+%   For comparison purposes, the lists of out-of-order notes from the
+%   previous \LaTeX{} run are needed.
 %    \begin{macrocode}
 \clist_new:N \g_@@_previous_after_clist
 \clist_new:N \g_@@_previous_before_clist
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_previous_notes_int}
-% The total number of notes created is needed, as this is used to see
-% if any zero-padding is required for the numbers. Of course, for this
-% to work there has to be a second LaTeX run.
+% \begin{macro}{\g_@@_previous_notes_int}
+%   The total number of notes created is needed, as this is used to see
+%   if any zero-padding is required for the numbers. Of course, for this
+%   to work there has to be a second \LaTeX{} run.
 %    \begin{macrocode}
 \int_new:N \g_@@_previous_notes_int
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_notes_tl}
-% Used to collect up the note text for writing in a single block
-% at the end of the document.
+% \begin{macro}{\g_@@_notes_tl}
+%   Used to collect up the note text for writing in a single block
+%   at the end of the document.
 %    \begin{macrocode}
 \tl_new:N \g_@@_notes_tl
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\l_@@_sortkey_field_tl}
-% The key for sorting is called \texttt{key} by standard \BibTeX\ and
-% \texttt{sortkey} by \pkg{biblatex}. It keeps everything clearer if
-% the appropriate name is stored in a token list. The value itself is
-% set up later.
+% \begin{macro}{\l_@@_sortkey_field_tl}
+%   The key for sorting is called \texttt{key} by standard \BibTeX{} and
+%   \texttt{sortkey} by \pkg{biblatex}. It keeps everything clearer if
+%   the appropriate name is stored in a token list. The value itself is
+%   set up later.
 %    \begin{macrocode}
 \tl_new:N \l_@@_sortkey_field_tl
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\g_@@_total_notes_int}
-% Tracks the total number of notes created, so that the module can tell
-% if any have been used.
+% \begin{macro}{\g_@@_total_notes_int}
+%   Tracks the total number of notes created, so that the module can tell
+%   if any have been used.
 %    \begin{macrocode}
 \int_new:N \g_@@_total_notes_int
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\subsection{Control options}
+% \subsection{Control options}
 %
-%\begin{macro}{\@@_cite:w}
-% The underlying function for citation starts off with no value:
-% this is then set up by the key--value settings given next.
+% \begin{macro}{\@@_cite:w}
+%   The underlying function for citation starts off with no value:
+%   this is then set up by the key--value settings given next.
 %    \begin{macrocode}
-\cs_new_nopar:Npn \@@_cite:w { }
+\cs_new:Npn \@@_cite:w { }
 %    \end{macrocode}
-%\end{macro}
-%
-%\begin{macro}{\g_@@_filename_tl}
-%\begin{macro}{\l_@@_keyword_tl}
-%\begin{macro}{\l_@@_note_field_tl}
-%\begin{macro}{\l_@@_note_name_tl}
-%\begin{macro}{\l_@@_presort_after_tl}
-%\begin{macro}{\l_@@_presort_before_tl}
-%\begin{macro}{\l_@@_presort_mixed_tl}
-%\begin{macro}{\l_@@_record_type_tl}
-%\begin{macro}{\l_@@_refsection_name_tl}
-%\begin{macro}{\l_@@_refsection_sep_tl}
-%\begin{macro}{\l_@@_record_type_tl}
-%\begin{macro}{\l_@@_sortkey_after_tl}
-%\begin{macro}{\l_@@_sortkey_before_tl}
-%\begin{macro}{\l_@@_sortkey_mixed_tl}
-%\begin{macro}{\l_@@_write_sortkey_bool}
-% The various package options are created.
+% \end{macro}
+%
+% \begin{macro}{\g_@@_filename_tl}
+% \begin{macro}
+%   {
+%     \l_@@_keyword_tl        ,
+%     \l_@@_note_field_tl     ,
+%     \l_@@_note_name_tl      ,
+%     \l_@@_presort_after_tl  ,
+%     \l_@@_presort_before_tl ,
+%     \l_@@_presort_mixed_tl  ,
+%     \l_@@_record_type_tl    ,
+%     \l_@@_refsection_name_tl,
+%     \l_@@_refsection_sep_tl ,
+%     \l_@@_record_type_tl    ,
+%     \l_@@_sortkey_after_tl  ,
+%     \l_@@_sortkey_before_tl ,
+%     \l_@@_sortkey_mixed_tl  ,
+%     \l_@@_write_sortkey_bool
+%  }
+%   The various package options are created.
 %    \begin{macrocode}
-\keys_define:nn { notes2bib } {
-  cite-function     .code:n      = 
-    { \AtBeginDocument { \cs_set_eq:NN \@@_cite:w #1 } }     ,
-  file-name            .tl_gset_x:N = \g_@@_filename_tl         ,
-  convert-endnotes     .choice:                                   ,
-  convert-endnotes 
-    / false .code:n = 
-    { \AtBeginDocument { \@@_from_bibnote:n { endnote } } }  ,
-  convert-endnotes 
-    / true .code:n  = 
-    { \AtBeginDocument { \@@_to_bibnote:n { endnote } } }    ,
-  convert-footnotes    .choice:                                   ,
-  convert-footnotes 
-    / false .code:n = 
-    { \AtBeginDocument { \@@_from_bibnote:n { footnote } } } ,
-  convert-footnotes 
-    / true .code:n = 
-    { \AtBeginDocument { \@@_to_bibnote:n { footnote } } }   ,
-  keyword-entry        .tl_set:N    = \l_@@_keyword_tl          ,
-  note-field           .tl_set:N    = \l_@@_note_field_tl       ,
-  note-name            .tl_set:N    = \l_@@_note_name_tl        ,
-  placement            .choice:                                   ,
-  placement 
-    / after    .code:n      = 
-    {
-      \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_after:n
-      \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_after_tl
-      \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_after_tl
-    },
-  placement 
-    / before    .code:n     = 
-    {
-      \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_before:n
-      \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_before_tl
-      \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_before_tl
-    },
-  placement 
-    / mixed    .code:n      = 
-    {
-      \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_mixed:n
-      \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_mixed_tl
-      \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_mixed_tl
-    },
-  presort-after        .tl_set:N    = \l_@@_presort_after_tl    ,
-  presort-before       .tl_set:N    = \l_@@_presort_before_tl   ,
-  presort-mixed        .tl_set:N    = \l_@@_presort_mixed_tl    ,
-  record-type          .tl_set:N    = \l_@@_record_type_tl      ,
-  refsection-name      .tl_set:N    = \l_@@_refsection_name_tl  ,
-  refsection-separator .tl_set:N    = \l_@@_refsection_sep_tl   ,
-  sort-key-after       .tl_set:N    = \l_@@_sortkey_before_tl   ,
-  sort-key-before      .tl_set:N    = \l_@@_sortkey_after_tl    ,
-  sort-key-mixed       .tl_set:N    = \l_@@_sortkey_mixed_tl    ,
-  use-sort-key         .bool_set:N  = \l_@@_write_sortkey_bool  ,
-}
+\keys_define:nn { notes2bib }
+  {
+    cite-function        .code:n      =
+      { \AtBeginDocument { \cs_set_eq:NN \@@_cite:w #1 } }     ,
+    file-name            .tl_gset_x:N = \g_@@_filename_tl      ,
+    convert-endnotes     .choice:                              ,
+    convert-endnotes
+      / false   .code:n =
+      { \AtBeginDocument { \@@_from_bibnote:n { endnote } } }  ,
+    convert-endnotes
+      / true   .code:n  =
+      { \AtBeginDocument { \@@_to_bibnote:n { endnote } } }    ,
+    convert-footnotes    .choice:                              ,
+    convert-footnotes
+      / false   .code:n =
+      { \AtBeginDocument { \@@_from_bibnote:n { footnote } } }  ,
+    convert-footnotes
+      / true   .code:n =
+      { \AtBeginDocument { \@@_to_bibnote:n { footnote } } }    ,
+    keyword-entry        .tl_set:N    = \l_@@_keyword_tl        ,
+    note-field           .tl_set:N    = \l_@@_note_field_tl     ,
+    note-name            .tl_set:N    = \l_@@_note_name_tl      ,
+    placement            .choice:                               ,
+    placement
+      / after  .code:n =
+      {
+        \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_after:n
+        \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_after_tl
+        \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_after_tl
+      },
+    placement
+      / before .code:n =
+      {
+        \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_before:n
+        \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_before_tl
+        \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_before_tl
+      },
+    placement
+      / mixed  .code:n =
+      {
+        \cs_set_eq:NN \@@_mark_note:n \@@_mark_note_mixed:n
+        \tl_set_eq:NN \l_@@_presort_tl \l_@@_presort_mixed_tl
+        \tl_set_eq:NN \l_@@_sortkey_tl \l_@@_sortkey_mixed_tl
+      },
+    presort-after        .tl_set:N    = \l_@@_presort_after_tl   ,
+    presort-before       .tl_set:N    = \l_@@_presort_before_tl  ,
+    presort-mixed        .tl_set:N    = \l_@@_presort_mixed_tl   ,
+    record-type          .tl_set:N    = \l_@@_record_type_tl     ,
+    refsection-name      .tl_set:N    = \l_@@_refsection_name_tl ,
+    refsection-separator .tl_set:N    = \l_@@_refsection_sep_tl  ,
+    sort-key-after       .tl_set:N    = \l_@@_sortkey_before_tl  ,
+    sort-key-before      .tl_set:N    = \l_@@_sortkey_after_tl   ,
+    sort-key-mixed       .tl_set:N    = \l_@@_sortkey_mixed_tl   ,
+    use-sort-key         .bool_set:N  = \l_@@_write_sortkey_bool
+  }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
 %
 % Default values for the keys are set up. Many of these probably never
 % change, but done in this way the package is much more flexible.
 %    \begin{macrocode}
-\keys_set:nn { notes2bib } {
-  cite-function        = \cite              ,
-  file-name            = notes2bib-\jobname ,
-  keyword-entry        = note               ,
-  note-field           = note               ,
-  note-name            = Note               ,
-  presort-after        = mn                 ,
-  presort-before       = ml                 ,
-  presort-mixed        = mm                 ,
-  record-type          = misc               ,
-  refsection-name      = Refsection         ,
-  refsection-separator = -                  ,
-  sort-key-after       = zzz                ,
-  sort-key-before      = aaa                ,
-  use-sort-key         = true               
+\keys_set:nn { notes2bib }
+  {
+    cite-function        = \cite              ,
+    file-name            = notes2bib-\jobname ,
+    keyword-entry        = note               ,
+    note-field           = note               ,
+    note-name            = Note               ,
+    presort-after        = mn                 ,
+    presort-before       = ml                 ,
+    presort-mixed        = mm                 ,
+    record-type          = misc               ,
+    refsection-name      = Refsection         ,
+    refsection-separator = -                  ,
+    sort-key-after       = zzz                ,
+    sort-key-before      = aaa                ,
+    use-sort-key         = true
 }
 %    \end{macrocode}
-%    
-%\changes{v2.0d}{2011/01/08}{Use new \cs{bibnote} record type with
-%  \pkg{biblatex} v1.1a or later}
-%\changes{v2.0e}{2011/01/18}{Add back references to bibnotes}
+%
 % A few options need to be altered or deactivated at the start of
 % the document.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \@ifpackageloaded { biblatex }
-    {
-      \@ifpackagelater { biblatex } { 2011/01/08 }
-        {
-          \keys_set:nn { notes2bib } 
-            { record-type = bibnote }
-          \DeclareBibliographyDriver { bibnote }
-            {
-              \usebibmacro { begentry }
-              \printfield  { note }
-              \setunit { \bibpagerefpunct }
-              \newblock
-              \usebibmacro { pageref }
-              \usebibmacro { finentry }
-            }
-        }
-        { }
-    }
-    { }
-  \keys_define:nn { notes2bib } 
-    {
-      cite-function     .code:n      = 
-        { \cs_set_eq:NN \@@_cite:w #1 }                              ,
-      file-name .code:n = 
-        { \msg_info:nnn { notes2bib } { preamble-only } { file-name } },
-      convert-endnotes / false .code:n = 
-        { \@@_from_bibnote:n { endnote } }                           ,
-      convert-endnotes / true .code:n  = 
-        { \@@_to_bibnote:n { endnote } }                             ,
-      convert-footnotes / false .code:n = 
-        { \@@_from_bibnote:n { footnote } }                          ,
-      convert-footnotes / true .code:n = 
-        { \@@_to_bibnote:n { footnote } }                            ,
-    }
-}
-\msg_new:nnn { notes2bib } { preamble-only } 
+\AtBeginDocument
+  {
+    \@ifpackageloaded { biblatex }
+      {
+        \@ifpackagelater { biblatex } { 2011/01/08 }
+          {
+            \keys_set:nn { notes2bib } { record-type = bibnote }
+            \DeclareBibliographyDriver { bibnote }
+              {
+                \usebibmacro { begentry }
+                \printfield  { note }
+                \setunit { \bibpagerefpunct }
+                \newblock
+                \usebibmacro { pageref }
+                \usebibmacro { finentry }
+              }
+          }
+          { }
+      }
+      { }
+    \keys_define:nn { notes2bib }
+      {
+        cite-function     .code:n      =
+          { \cs_set_eq:NN \@@_cite:w #1 }                                 ,
+        file-name .code:n =
+          { \msg_info:nnn { notes2bib } { preamble-only } { file-name } } ,
+        convert-endnotes / false .code:n =
+          { \@@_from_bibnote:n { endnote } }                              ,
+        convert-endnotes / true .code:n  =
+          { \@@_to_bibnote:n { endnote } }                                ,
+        convert-footnotes / false .code:n =
+          { \@@_from_bibnote:n { footnote } }                             ,
+        convert-footnotes / true .code:n =
+          { \@@_to_bibnote:n { footnote } }
+      }
+  }
+\msg_new:nnn { notes2bib } { preamble-only }
   { The~option~'#1'~can~only~be~used~in~the~preamble. }
 %    \end{macrocode}
-%    
-%\subsection{Support for \pkg{biblatex} \texttt{refsection} system}
-%
-%\begin{macro}{\@@_insert_refsection:}
-%\changes{v2.0d}{2011/01/08}{Added support for refsections}
-% When using \pkg{biblatex}, it's possible that \texttt{refsection}s are
-% in use. If so, to ensure that labels are always unique the
-% \texttt{refsection} number is added to the label.
+%
+% \subsection{Support for \pkg{biblatex} \texttt{refsection} system}
+%
+% \begin{macro}[EXP]{\@@_insert_refsection:}
+%   When using \pkg{biblatex}, it's possible that \texttt{refsection}s are
+%   in use. If so, to ensure that labels are always unique the
+%   \texttt{refsection} number is added to the label.
 %    \begin{macrocode}
-\cs_new_nopar:Npn \@@_insert_refsection: { }
-\AtBeginDocument {
-  \@ifpackageloaded { biblatex }
-    {
-      \cs_set_nopar:Npn \@@_insert_refsection:
-        {
-          \int_compare:nNnT { \value { refsection } } > { 0 }
-            { 
-              \tl_use:N \l_@@_refsection_name_tl
-              \arabic { refsection }
-              \tl_use:N \l_@@_refsection_sep_tl
+\cs_new:Npn \@@_insert_refsection: { }
+\AtBeginDocument
+  {
+    \@ifpackageloaded { biblatex }
+      {
+        \cs_set:Npn \@@_insert_refsection:
+          {
+            \int_compare:nNnT { \value { refsection } } > { 0 }
+              {
+                \tl_use:N \l_@@_refsection_name_tl
+                \arabic { refsection }
+                \tl_use:N \l_@@_refsection_sep_tl
             }
-        }
-    }
-    { }
-}
+          }
+      }
+      { }
+  }
 %    \end{macrocode}
-%\end{macro}
-%    
-%\subsection{Options from version one}
+% \end{macro}
+%
+% \subsection{Options from version one}
 %
-%\changes{v2.0k}{2013/07/11}{Drop use of \texttt{.meta:x} key property}
-% The new option names are preferred, but the old ones still need to 
+% The new option names are preferred, but the old ones still need to
 % work correctly.
 %    \begin{macrocode}
-\keys_define:nn { notes2bib } {
-  cite        .code:n =
-    {
-      \use:x
-        { \keys_set:nn { notes2bib } { cite-function = \exp_not:c {#1} } } 
-    } ,
-  debug       .code:n = { }                                     ,
-  endnotes    .meta:n = { convert-footnotes = #1 }              ,
-  etex        .code:n = { }                                     ,
-  field       .meta:n = { note-field        = #1 }              ,
-  footnotes   .meta:n = { convert-footnotes = #1 }              ,
-  head        .meta:n = { placement         = before }          ,
-  keyhead     .meta:n = { sort-key-before   = #1 }              ,
-  keytail     .meta:n = { sort-key-after    = #1 }              ,
-  keynone     .meta:n = { sort-key-mixed    = #1 }              ,
-  keyword     .meta:n = { keyword-entry     = #1 }              ,
-  log         .meta:n = { }                                     ,
-  name        .meta:n = { note-name         = #1 }              ,
-  prefix      .meta:n = { file-name         = #1 \jobname }     ,
-  presorthead .meta:n = { presort-before    = #1 }              ,
-  presorttail .meta:n = { presort-after     = #1 }              ,
-  presortnone .meta:n = { presort-mixed     = #1 }              ,
-  record      .meta:n = { record-type       = #1 }              ,
-  sort        .choice:                                          ,
-  sort / head .meta:n = { placement         = before }          ,
-  sort / none .meta:n = { placement         = after }           ,
-  sort / tail .meta:n = { placement         = mixed }           ,
-  tail        .meta:n = { placement         = after }           ,
-  writekey    .meta:n = { use-sort-key      = #1 }
-}
+\keys_define:nn { notes2bib }
+  {
+    cite        .code:n =
+      {
+        \use:x
+          { \keys_set:nn { notes2bib } { cite-function = \exp_not:c {#1} } }
+      } ,
+    debug       .code:n = { }                                 ,
+    endnotes    .meta:n = { convert-footnotes = #1 }          ,
+    etex        .code:n = { }                                 ,
+    field       .meta:n = { note-field        = #1 }          ,
+    footnotes   .meta:n = { convert-footnotes = #1 }          ,
+    head        .meta:n = { placement         = before }      ,
+    keyhead     .meta:n = { sort-key-before   = #1 }          ,
+    keytail     .meta:n = { sort-key-after    = #1 }          ,
+    keynone     .meta:n = { sort-key-mixed    = #1 }          ,
+    keyword     .meta:n = { keyword-entry     = #1 }          ,
+    log         .meta:n = { }                                 ,
+    name        .meta:n = { note-name         = #1 }          ,
+    prefix      .meta:n = { file-name         = #1 \jobname } ,
+    presorthead .meta:n = { presort-before    = #1 }          ,
+    presorttail .meta:n = { presort-after     = #1 }          ,
+    presortnone .meta:n = { presort-mixed     = #1 }          ,
+    record      .meta:n = { record-type       = #1 }          ,
+    sort        .choice:                                      ,
+    sort / head .meta:n = { placement         = before }      ,
+    sort / none .meta:n = { placement         = after }       ,
+    sort / tail .meta:n = { placement         = mixed }       ,
+    tail        .meta:n = { placement         = after }       ,
+    writekey    .meta:n = { use-sort-key      = #1 }
+  }
 %    \end{macrocode}
-%    
-%\subsection{Utility functions}
-%    
-%\begin{macro}{\@@_note_name:}
-% When note citations are generated automatically, the text to indicate
-% a note plus the number of the current note needs to be turned into
-% something printable. The value tests here mean that if there are more
-% than nine notes, notes 1--9 have the number padded to get proper 
-% sorting. This needs two passes, as the total number of notes is only
-% available at the end of the LaTeX run.
+%
+% \subsection{Utility functions}
+%
+% \begin{macro}[EXP]{\@@_note_name:}
+%   When note citations are generated automatically, the text to indicate
+%   a note plus the number of the current note needs to be turned into
+%   something printable. The value tests here mean that if there are more
+%   than nine notes, notes 1--9 have the number padded to get proper
+%   sorting. This needs two passes, as the total number of notes is only
+%   available at the end of the \LaTeX{} run.
 %    \begin{macrocode}
-\cs_new_nopar:Npn \@@_note_name: {
-  \@@_insert_refsection:
-  \tl_use:N \l_@@_note_name_tl
-  \int_compare:nNnT \g_@@_previous_notes_int > \c_nine
-    { \int_compare:nNnT \g_@@_note_int < \c_ten { 0 } }
-  \int_to_arabic:n { \g_@@_note_int }
-}
+\cs_new:Npn \@@_note_name:
+  {
+    \@@_insert_refsection:
+    \tl_use:N \l_@@_note_name_tl
+    \int_compare:nNnT \g_@@_previous_notes_int > 9
+      { \int_compare:nNnT \g_@@_note_int < { 10 } { 0 } }
+    \int_to_arabic:n { \g_@@_note_int }
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\@@_filesw:}
-% Making sorting work means messing about with \cs{if@filesw}. The 
-% function created here is used to store the current status of the
-% flag.
+% \begin{macro}{\@@_filesw:}
+%   Making sorting work means messing about with \cs{if@filesw}. The
+%   function created here is used to store the current status of the
+%   flag. As this is needed for saving \TeX{} true/false status, it's
+%   best to set it up from the start as a conditional.
 %    \begin{macrocode}
-\cs_new_nopar:Npn \@@_filesw: { }
+\cs_new_eq:NN \@@_filesw: \tex_iftrue:D
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\subsection{Marking notes in the text}
+% \subsection{Marking notes in the text}
 %
-%\begin{macro}{\@@_mark_note:n}
-%\begin{macro}{\@@_mark_note:x}
-% The function to mark note positions is initially declared with no
-% expansion. The real meaning will be set by the key--value setting, 
-% and depends on the placement of notes compared with real citations.
+% \begin{macro}{\@@_mark_note:n, \@@_mark_note:x}
+%   The function to mark note positions is initially declared with no
+%   expansion. The real meaning will be set by the key--value setting,
+%   and depends on the placement of notes compared with real citations.
 %    \begin{macrocode}
-\cs_new:Npn \@@_mark_note:n #1 { }
+\cs_new_protected:Npn \@@_mark_note:n #1 { }
 \cs_generate_variant:Nn \@@_mark_note:n { x }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%
-%\begin{macro}{\@@_mark_note_after:n}
-%\begin{macro}[aux]{\@@_mark_note_after_aux:n}
-% For notes which come after citations, the entry is recorded and an
-% auxiliary is called. The nature of the second function is dependent
-% on the other packages loaded.
+% \end{macro}
+%
+% \begin{macro}{\@@_mark_note_after:n}
+% \begin{macro}[aux]{\@@_mark_note_after_aux:n}
+%   For notes which come after citations, the entry is recorded and an
+%   auxiliary is called. The nature of the second function is dependent
+%   on the other packages loaded.
 %    \begin{macrocode}
-\cs_new_protected:Npn \@@_mark_note_after:n #1 {
-  \int_gincr:N \g_@@_total_notes_int
-  \clist_gput_right:Nx \g_@@_after_clist {#1}
-  \@@_mark_note_after_aux:n {#1}
-}
-\cs_new:Npn \@@_mark_note_after_aux:n #1 { }
+\cs_new_protected:Npn \@@_mark_note_after:n #1
+  {
+    \int_gincr:N \g_@@_total_notes_int
+    \clist_gput_right:Nx \g_@@_after_clist {#1}
+    \@@_mark_note_after_aux:n {#1}
+  }
+\cs_new_protected:Npn \@@_mark_note_after_aux:n #1 { }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
 %
-%\begin{macro}{\@@_mark_note_before:n}
-% Notes to appear before all citations are simple recorded, as they will
-% be set up on the next LaTeX run.
+% \begin{macro}{\@@_mark_note_before:n}
+%   Notes to appear before all citations are simple recorded, as they will
+%   be set up on the next \LaTeX{} run.
 %    \begin{macrocode}
-\cs_new_protected:Npn \@@_mark_note_before:n #1 {
-  \int_gincr:N \g_@@_total_notes_int
-  \clist_gput_right:Nx \g_@@_before_clist {#1}
-  \@@_cite:w {#1}
-}
+\cs_new_protected:Npn \@@_mark_note_before:n #1
+  {
+    \int_gincr:N \g_@@_total_notes_int
+    \clist_gput_right:Nx \g_@@_before_clist {#1}
+    \@@_cite:w {#1}
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\@@_mark_note_mixed:n}
-% Mixed citations are very easy to handle: just use whatever cite
-% command is current.
+% \begin{macro}{\@@_mark_note_mixed:n}
+%   Mixed citations are very easy to handle: just use whatever cite
+%   command is current.
 %    \begin{macrocode}
-\cs_new_protected:Npn \@@_mark_note_mixed:n #1 {
-  \int_gincr:N \g_@@_total_notes_int
-  \@@_cite:w {#1}
-}
+\cs_new_protected:Npn \@@_mark_note_mixed:n #1
+  {
+    \int_gincr:N \g_@@_total_notes_int
+    \@@_cite:w {#1}
+  }
 %    \end{macrocode}
-%\end{macro}
-%
-%\subsection{Writing note text to the database}
-%    
-%\begin{macro}{\@@_write_field:nn}
-%\begin{macro}{\@@_write_field:Vn}
-% To keep the auto-generated database readable, there needs to be some
-% formatting. This is provided by using a dedicated function to 
-% write the various fields to it. Although the \texttt{V} variant is
-% not technically needed (writing expands everything), it helps to keep
-% the intention of the code here clearer.
+% \end{macro}
+%
+% \subsection{Writing note text to the database}
+%
+% \begin{macro}[EXP]{\@@_write_field:nn, \@@_write_field:Vn}
+%   To keep the auto-generated database readable, there needs to be some
+%   formatting. This is provided by using a dedicated function to
+%   write the various fields to it. Although the \texttt{V} variant is
+%   not technically needed (writing expands everything), it helps to keep
+%   the intention of the code here clearer.
 %    \begin{macrocode}
-\cs_new:Npn \@@_write_field:nn #1#2 {
-  \c_space_tl \c_space_tl #1 \c_space_tl = \c_space_tl {#2} , 
-  \iow_newline:
-}
+\cs_new:Npn \@@_write_field:nn #1#2
+  {
+    \c_space_tl \c_space_tl #1 \c_space_tl = \c_space_tl {#2} ,
+    \iow_newline:
+  }
 \cs_generate_variant:Nn \@@_write_field:nn { V }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%    
-%\begin{macro}{\@@_write_note:nn}
-%\changes{v2.0b}{2010/01/09}{Add \cs{else:} branch to handle case
-%  where \cs{if@filesw} is false}
-%\begin{macro}[aux]{\@@_write_note_aux:nn}
-%\begin{macro}{\@@_write_note:xn}
-% The writing function takes two arguments: the name of the note, and
-% the text itself. There is a need to check on the LaTeX2e system to
-% turn off writing, with a hand-over so there is no problem with 
-% balancing ifs.
+% \end{macro}
+%
+% \begin{macro}{\notestobib_write_note:nn, \notestobib_write_note:xn}
+% \begin{macro}[aux]{\@@_write_note:nn}
+%    The writing function takes two arguments: the name of the note, and
+%    the text itself. There is a need to check on the \LaTeXe{} system to
+%    turn off writing, with a hand-over so there is no problem with
+%    balancing ifs.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \@@_write_note:nn {
-  \if@filesw
-    \exp_after:wN \@@_write_note_aux:nn
-  \else:
-    \exp_after:wN \use_none:nn  
-  \fi:
-}
-\cs_new_protected:Npn \@@_write_note_aux:nn #1#2 {
-  \tl_gput_right:Nx \g_@@_notes_tl
-    {
-      @ \l_@@_record_type_tl 
-        {
-          #1 , \iow_newline:
-          \@@_write_field:Vn \l_@@_note_field_tl { \exp_not:n {#2} }
-          \bool_if:NT \l_@@_write_sortkey_bool 
-            {
-              \@@_write_field:Vn \l_@@_sortkey_field_tl  
-                { \l_@@_sortkey_tl #1 }
-            }
-          \@@_write_field:nn { keywords } { \l_@@_keyword_tl }
-          \@@_write_field:nn { presort } { \l_@@_presort_tl }
-        }
-      \iow_newline:
-      \iow_newline:  
-    }
-}
-\cs_generate_variant:Nn \@@_write_note:nn { x }
+\cs_new_protected:Npn \notestobib_write_note:nn
+  {
+    \if@filesw
+      \exp_after:wN \@@_write_note:nn
+    \else:
+      \exp_after:wN \use_none:nn
+    \fi:
+  }
+\cs_generate_variant:Nn \notestobib_write_note:nn { x }
+\cs_new_protected:Npn \@@_write_note:nn #1#2
+  {
+    \tl_gput_right:Nx \g_@@_notes_tl
+      {
+        @ \l_@@_record_type_tl
+          {
+            #1 , \iow_newline:
+            \@@_write_field:Vn \l_@@_note_field_tl { \exp_not:n {#2} }
+            \bool_if:NT \l_@@_write_sortkey_bool
+              {
+                \@@_write_field:Vn \l_@@_sortkey_field_tl
+                  { \l_@@_sortkey_tl #1 }
+              }
+            \@@_write_field:nn { keywords } { \l_@@_keyword_tl }
+            \@@_write_field:nn { presort } { \l_@@_presort_tl }
+          }
+        \iow_newline:
+        \iow_newline:
+      }
+  }
 %    \end{macrocode}
-%\end{macro}    
-%\end{macro}
-%\end{macro} 
-%
-%\subsection{Handling out of order notes}
-%
-%\begin{macro}{\@@_record_notes:}
-%\begin{macro}[aux]{\@@_flush_notes_aux:}
-% Notes after citations are not written to the \file{aux} file when 
-% given, but are held in a queue. This is flushed here, which means
-% actually doing the citation and also recording the notes so they
-% are available in the next LaTeX run. The list is also transferred
-% to a secondary one, which is used for comparison purposes right at the
-% end of the document.
+
+% \end{macro}
+% \end{macro}
+%
+% \subsection{Handling out of order notes}
+%
+% \begin{macro}{\@@_record_notes:}
+% \begin{macro}[aux]{\@@_flush_notes_aux:}
+%   Notes after citations are not written to the \file{aux} file when
+%   given, but are held in a queue. This is flushed here, which means
+%   actually doing the citation and also recording the notes so they
+%   are available in the next \LaTeX{} run. The list is also transferred
+%   to a secondary one, which is used for comparison purposes right at the
+%   end of the document.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \@@_record_notes: {
-  \if@filesw
-    \exp_after:wN \@@_flush_notes_aux:
-  \fi
-}
-\cs_new_protected_nopar:Npn \@@_flush_notes_aux: {
-  \clist_if_empty:NF \g_@@_before_clist 
-    {
-      \iow_now:Nx \@auxout 
-        { \NotesBeforeCitations { \exp_not:V \g_@@_before_clist } }
-      \clist_gput_right:NV \g_@@_all_before_clist \g_@@_before_clist
-      \clist_gclear:N \g_@@_before_clist
-    }
-  \clist_if_empty:NF \g_@@_after_clist 
-    {
-      \iow_now:Nx \@auxout
-        { \NotesAfterCitations { \exp_not:V \g_@@_after_clist } }
-      \exp_args:NV \nocite \g_@@_after_clist
-      \clist_gput_right:NV \g_@@_all_after_clist \g_@@_after_clist
-      \clist_gclear:N \g_@@_after_clist
-    }
-}
+\cs_new_protected:Npn \@@_record_notes:
+  {
+    \if@filesw
+      \exp_after:wN \@@_flush_notes_aux:
+    \fi
+  }
+\cs_new_protected:Npn \@@_flush_notes_aux:
+  {
+    \clist_if_empty:NF \g_@@_before_clist
+      {
+        \iow_now:Nx \@auxout
+          { \NotesBeforeCitations { \exp_not:V \g_@@_before_clist } }
+        \clist_gput_right:NV \g_@@_all_before_clist \g_@@_before_clist
+        \clist_gclear:N \g_@@_before_clist
+      }
+    \clist_if_empty:NF \g_@@_after_clist
+      {
+        \iow_now:Nx \@auxout
+          { \NotesAfterCitations { \exp_not:V \g_@@_after_clist } }
+        \exp_args:NV \nocite \g_@@_after_clist
+        \clist_gput_right:NV \g_@@_all_after_clist \g_@@_after_clist
+        \clist_gclear:N \g_@@_after_clist
+      }
+  }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
 %
-%\subsection{Interchanging note types}
+% \subsection{Interchanging note types}
 %
-%\begin{macro}{\@@_to_bibnote:n}
-% Converting other notes to bibliography notes is simple: just set
-% them equal.
+% \begin{macro}{\@@_to_bibnote:n}
+%   Converting other notes to bibliography notes is simple: just set
+%   them equal.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \@@_to_bibnote:n #1 {
-  \cs_set_eq:cN {#1}        \bibnote
-  \cs_set_eq:cN { #1 mark } \bibnotemark
-  \cs_set_eq:cN { #1 text } \bibnotetext
-}
+\cs_new_protected:Npn \@@_to_bibnote:n #1
+  {
+    \cs_set_eq:cN {#1}        \bibnote
+    \cs_set_eq:cN { #1 mark } \bibnotemark
+    \cs_set_eq:cN { #1 text } \bibnotetext
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\@@_from_bibnote:n}
-% The reverse process needs the original definitions, which are saved
-% by the module for later recovery.
+% \begin{macro}{\@@_from_bibnote:n}
+%   The reverse process needs the original definitions, which are saved
+%   by the module for later recovery.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \@@_from_bibnote:n #1 {
-  \cs_set_eq:cc {#1}        { @@_ #1 :w }
-  \cs_set_eq:cc { #1 mark } { @@_ #1 mark:w }
-  \cs_set_eq:cc { #1 text } { @@_ #1 text:w }
-}
+\cs_new_protected:Npn \@@_from_bibnote:n #1
+  {
+    \cs_set_eq:cc {#1}        { @@_ #1 :w }
+    \cs_set_eq:cc { #1 mark } { @@_ #1 mark:w }
+    \cs_set_eq:cc { #1 text } { @@_ #1 text:w }
+  }
 %    \end{macrocode}
-%\end{macro}
-%
-%\begin{macro}{\@@_endnote:w}
-%\begin{macro}{\@@_endnotemark:w}
-%\begin{macro}{\@@_endnotetext:w}
-%\begin{macro}{\@@_footnote:w}
-%\begin{macro}{\@@_footnotemark:w}
-%\begin{macro}{\@@_footnotetext:w}
-% At the start of the document, the definitions for endnotes and 
-% footnotes are saved so that footnotes and endnotes can be turned into
-% bibliography notes and back again.
+% \end{macro}
+%
+% \begin{macro}
+%   {
+%     \@@_endnote:w     ,
+%     \@@_endnotemark:w ,
+%     \@@_endnotetext:w ,
+%     \@@_footnote:w    ,
+%     \@@_footnotemark:w,
+%     \@@_footnotetext:w
+%   }
+%   At the start of the document, the definitions for endnotes and
+%   footnotes are saved so that footnotes and endnotes can be turned into
+%   bibliography notes and back again.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \cs_set_eq:NN \@@_endnote:w     \endnote     
-  \cs_set_eq:NN \@@_endnotemark:w \endnotemark 
-  \cs_set_eq:NN \@@_endnotetext:w \endnotetext
-  \cs_set_eq:NN \@@_footnote:w     \footnote     
-  \cs_set_eq:NN \@@_footnotemark:w \footnotemark 
-  \cs_set_eq:NN \@@_footnotetext:w \footnotetext
-}
+\AtBeginDocument
+  {
+    \cs_new_eq:NN \@@_endnote:w     \endnote
+    \cs_new_eq:NN \@@_endnotemark:w \endnotemark
+    \cs_new_eq:NN \@@_endnotetext:w \endnotetext
+    \cs_new_eq:NN \@@_footnote:w     \footnote
+    \cs_new_eq:NN \@@_footnotemark:w \footnotemark
+    \cs_new_eq:NN \@@_footnotetext:w \footnotetext
+  }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%\end{macro}
-%
-%\subsection{Package-dependent code}
-%
-%\begin{macro}{\@@_create_print_notes:}
-%\begin{macro}{\@@_print_notes:}
-% The method for printing notes depends on whether \pkg{biblatex} is
-% in use. If it is, then a selective call to \cs{printbibliography} is
-% made. Otherwise, the original \cs{bibliography} function is called,
-% and passed the name of the notes file.
+% \end{macro}
+%
+% \subsection{Package-dependent code}
+%
+% \begin{macro}{\@@_create_print_notes:, \@@_print_notes:}
+%   The method for printing notes depends on whether \pkg{biblatex} is
+%   in use. If it is, then a selective call to \cs{printbibliography} is
+%   made. Otherwise, the original \cs{bibliography} function is called,
+%   and passed the name of the notes file.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \@ifpackageloaded { biblatex } 
-    {
-      \cs_new_protected_nopar:Npn \@@_print_notes: 
-        {
-          \cs_set_nopar:Npx \@@_create_print_notes: 
-            {
-              \printbibliography 
-                [ keyword = \exp_not:V \l_@@_keyword_tl ] 
-            }
-            \@@_create_print_notes:
-        }
-    }
-    {
-      \cs_new_protected_nopar:Npn \@@_print_notes: 
-        { \exp_args:NV \@@_bibliography:n \g_@@_filename_tl }
-    }
-}
-\cs_new_nopar:Npn \@@_create_print_notes: { }
+\AtBeginDocument
+  {
+    \@ifpackageloaded { biblatex }
+      {
+        \cs_new_protected:Npn \@@_print_notes:
+          {
+            \cs_set:Npx \@@_create_print_notes:
+              {
+                \printbibliography
+                  [ keyword = \exp_not:V \l_@@_keyword_tl ]
+              }
+              \@@_create_print_notes:
+          }
+      }
+      {
+        \cs_new_protected:Npn \@@_print_notes:
+          { \exp_args:NV \@@_bibliography:n \g_@@_filename_tl }
+      }
+  }
+\cs_new_protected:Npn \@@_create_print_notes: { }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%
-%\begin{macro}{\@@_attach_bibliography:}
-%\changes{v2.0d}{2011/01/08}{Use new \cs{bibliography*} function with
-%  \pkg{biblatex} v1.1a or later}
-%\changes{v2.0f}{2011/02/23}{Use new \cs{addglobalbib} function with
-%  \pkg{biblatex} v1.2 or later}
-%\changes{v2.0h}{2011/09/09}{Use \cs{addglobalbib} function irrespective
-%  of load order}
-%\begin{macro}{\bibliography}
-%\begin{macro}{\@@_bibliography:n}
-% Getting the database created here to be scanned by \BibTeX\ is
-% dependant on whether \pkg{biblatex} is being used. If it is, and it is
-% already loaded, then the data can be added now. On the other hand, if
-% it is not already loaded a check is made at the end of the preamble.
-% The \cs{bibliography} function has to be patched if \pkg{biblatex} is
-% not in use.
+% \end{macro}
+%
+% \begin{macro}{\@@_attach_bibliography:}
+% \begin{macro}{\bibliography}
+% \begin{macro}{\@@_bibliography:n}
+%   Getting the database created here to be scanned by \BibTeX{} is
+%   dependant on whether \pkg{biblatex} is being used. If it is, and it is
+%   already loaded, then the data can be added now. On the other hand, if
+%   it is not already loaded a check is made at the end of the preamble.
+%   The \cs{bibliography} function has to be patched if \pkg{biblatex} is
+%   not in use.
 %    \begin{macrocode}
-\cs_new_nopar:Npn \@@_attach_bibliography: {
-  \@ifpackageloaded { biblatex } 
-    {
-      \@ifpackagelater { biblatex } { 2011/01/08 }
-        { 
-          \@ifpackagelater { biblatex } { 2011/02/12 }
-            { 
-              
-              \exp_args:No \addglobalbib 
-                { \g_@@_filename_tl .bib }
-            }
-            { \exp_args:NNV \bibliography * \g_@@_filename_tl }
-        }
-        { \exp_args:NV \bibliography \g_@@_filename_tl }
-    }
-    {
-      \cs_new_eq:NN \@@_bibliography:n \bibliography
-      \RenewDocumentCommand \bibliography { m } 
-        {
-          \int_compare:nNnTF \g_@@_total_notes_int = \c_zero
-            { \@@_bibliography:n {##1} }
-            {
-              \cs_set_nopar:Npx \@@_attach_bibliography: 
-                {
-                  \exp_not:N \@@_bibliography:n 
-                    { 
-                      \exp_not:n {##1} , \exp_not:V \g_@@_filename_tl 
-                    }
-                }
-              \@@_attach_bibliography:
-            }
-        }
-    }
-}
-\@ifpackageloaded { biblatex } 
+\cs_new_protected:Npn \@@_attach_bibliography:
+  {
+    \@ifpackageloaded { biblatex }
+      {
+        \@ifpackagelater { biblatex } { 2011/01/08 }
+          {
+            \@ifpackagelater { biblatex } { 2011/02/12 }
+              { \exp_args:No \addglobalbib { \g_@@_filename_tl .bib } }
+              { \exp_args:NNV \bibliography * \g_@@_filename_tl }
+          }
+          { \exp_args:NV \bibliography \g_@@_filename_tl }
+      }
+      {
+        \cs_new_eq:NN \@@_bibliography:n \bibliography
+        \RenewDocumentCommand \bibliography { m }
+          {
+            \int_compare:nNnTF \g_@@_total_notes_int = 0
+              { \@@_bibliography:n {##1} }
+              {
+                \cs_set:Npx \@@_attach_bibliography:
+                  {
+                    \exp_not:N \@@_bibliography:n
+                      { \exp_not:n {##1} , \exp_not:V \g_@@_filename_tl }
+                  }
+                \@@_attach_bibliography:
+              }
+          }
+      }
+  }
+\@ifpackageloaded { biblatex }
   {
     \@ifpackagelater { biblatex } { 2011/01/08 }
-      { 
+      {
         \@ifpackagelater { biblatex } { 2011/02/12 }
-          { 
-            
-            \exp_args:No \addglobalbib 
-              { \g_@@_filename_tl .bib }
-          }
+          { \exp_args:No \addglobalbib { \g_@@_filename_tl .bib } }
           { \exp_args:NNV \bibliography * \g_@@_filename_tl }
       }
       { \exp_args:NV \bibliography \g_@@_filename_tl }
   }
   { \AtBeginDocument { \@@_attach_bibliography: } }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
 %
 % \pkg{biblatex} uses the name \texttt{sortkey} for a key to sort by,
 % whereas other style call the same concept \texttt{key}.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \@ifpackageloaded { biblatex } 
-    { \tl_set:Nn \l_@@_sortkey_field_tl { sortkey } }
-    { \tl_set:Nn \l_@@_sortkey_field_tl { key } }
-}
+\AtBeginDocument
+  {
+    \@ifpackageloaded { biblatex }
+      { \tl_set:Nn \l_@@_sortkey_field_tl { sortkey } }
+      { \tl_set:Nn \l_@@_sortkey_field_tl { key } }
+  }
 %    \end{macrocode}
 %
 % To get the correct ordering for notes, writing to the \file{aux} file
-% needs to be turned on and off. With \pkg{biblatex}, there is a 
+% needs to be turned on and off. With \pkg{biblatex}, there is a
 % convenient hook for this. Otherwise, everything has to happen after
 % the citation command.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \@ifpackageloaded { biblatex } 
-    {
-      \cs_set:Npn \@@_mark_note_after_aux:n #1 
-        {
-          \AtNextCite { \@fileswfalse }
-          \@@_cite:w {#1}
-        }
-    }
-    {
-      \cs_set:Npn \@@_mark_note_after_aux:n #1 
-        {
-          \cs_set_eq:NN \@@_filesw: \if@filesw
-          \@fileswfalse
-          \@@_cite:w {#1}
-          \cs_set_eq:NN \if@filesw \@@_filesw:
-        }    
-    }
-}
+\AtBeginDocument
+  {
+    \@ifpackageloaded { biblatex }
+      {
+        \cs_set_protected:Npn \@@_mark_note_after_aux:n #1
+          {
+            \AtNextCite { \@fileswfalse }
+            \@@_cite:w {#1}
+          }
+      }
+      {
+        \cs_set_protected:Npn \@@_mark_note_after_aux:n #1
+          {
+            \cs_set_eq:NN \@@_filesw: \if@filesw
+            \@fileswfalse
+            \@@_cite:w {#1}
+            \cs_set_eq:NN \if@filesw \@@_filesw:
+          }
+      }
+  }
 %    \end{macrocode}
 %
-%\begin{macro}{\@@_aux_hook:}
-% If the \pkg{cite} package is loaded, then there is a hook to
-% reset the \file{aux} file after the citation. This means that moving
-% punctuation will still work under these circumstances.  However, the
-% way \pkg{cite} sets things up is a little complicated. The link needs
-% to be made at the end of the \cs{document} macro.
+% \begin{macro}{\@@_aux_hook:}
+%   If the \pkg{cite} package is loaded, then there is a hook to
+%   reset the \file{aux} file after the citation. This means that moving
+%   punctuation will still work under these circumstances.  However, the
+%   way \pkg{cite} sets things up is a little complicated. The link needs
+%   to be made at the end of the \cs{document} macro.
 %    \begin{macrocode}
-\AtBeginDocument {
-  \@ifpackageloaded { cite } 
-    {
-      \cs_set:Npn \@@_mark_note_after_aux:n #1 
-        {
-          \cs_set_eq:NN \@@_filesw: \if@filesw
-          \@fileswfalse
-          \cs_set_nopar:Npn \@@_aux_hook: 
-            {
-              \cs_set_eq:NN \if@filesw \@@_filesw:
-              \cs_set_nopar:Npn \@@_aux_hook: { }
-            }
-          \@@_cite:w {#1}
-        }
-      \cs_new_nopar:Npn \@@_aux_hook: { }
-      \tl_gput_right:Nn \g_@@_document_hook_tl 
-        {
-          \cs_if_exist:NF \@restore@auxhandle 
-            { \tl_new:N \@restore@auxhandle }
-          \tl_put_right:Nn \@restore@auxhandle { \@@_aux_hook: }
-        }
-    } 
-    { }
-}
+\AtBeginDocument
+  {
+    \@ifpackageloaded { cite }
+      {
+        \cs_set_protected:Npn \@@_mark_note_after_aux:n #1
+          {
+            \cs_set_eq:NN \@@_filesw: \if@filesw
+            \@fileswfalse
+            \cs_set:Npn \@@_aux_hook:
+              {
+                \cs_set_eq:NN \if@filesw \@@_filesw:
+                \cs_set:Npn \@@_aux_hook: { }
+              }
+            \@@_cite:w {#1}
+          }
+        \cs_new:Npn \@@_aux_hook: { }
+        \tl_gput_right:Nn \g_@@_document_hook_tl
+          {
+            \cs_if_exist:NF \@restore@auxhandle
+              { \tl_new:N \@restore@auxhandle }
+            \tl_put_right:Nn \@restore@auxhandle { \@@_aux_hook: }
+          }
+      }
+      { }
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
 %\subsection{User functions}
 %
-%\begin{macro}{\bibnote}
-%\begin{macro}{\@@_bibnote:nn}
-%\begin{macro}{\@@_bibnote:xn}
-% Creating a not from scratch is a multi-step operation. First, check
-% if a label was given by the user. If it was not, then one is created
-% by incrementing the automatic number and fully expanding 
-% \cs{@@_note_name:}. The second phase is to create the note. The text
-% is dealt with first as this leaves the note-marking code at the end
-% of the function (needed if punctuation is to be moved).
+% \begin{macro}{\bibnote}
+% \begin{macro}{\@@_bibnote:nn, \@@_bibnote:xn}
+%   Creating a not from scratch is a multi-step operation. First, check
+%   if a label was given by the user. If it was not, then one is created
+%   by incrementing the automatic number and fully expanding
+%   \cs{@@_note_name:}. The second phase is to create the note. The text
+%   is dealt with first as this leaves the note-marking code at the end
+%   of the function (needed if punctuation is to be moved).
 %    \begin{macrocode}
-\NewDocumentCommand \bibnote { o +m } {
-  \IfNoValueTF {#1} 
-    {
-      \int_gincr:N \g_@@_note_int
-      \@@_bibnote:xn { \@@_note_name: } {#2}
-    }
-    { \@@_bibnote:xn { \@@_insert_refsection: #1 } {#2} }
-}
-\cs_new_protected:Npn \@@_bibnote:nn #1#2 {
-  \@@_write_note:nn {#1} {#2}
-  \@@_mark_note:n {#1}
-}
+\NewDocumentCommand \bibnote { o +m }
+  {
+    \IfNoValueTF {#1}
+      {
+        \int_gincr:N \g_@@_note_int
+        \@@_bibnote:xn { \@@_note_name: } {#2}
+      }
+      { \@@_bibnote:xn { \@@_insert_refsection: #1 } {#2} }
+  }
+\cs_new_protected:Npn \@@_bibnote:nn #1#2
+  {
+    \notestobib_write_note:nn {#1} {#2}
+    \@@_mark_note:n {#1}
+  }
 \cs_generate_variant:Nn \@@_bibnote:nn { x }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
 %
-%\begin{macro}{\bibnotemark}
-% Simply marking a note has similar requirements, but as there is only
-% a single internal function to call the code is less complex.
+% \begin{macro}{\bibnotemark}
+%   Simply marking a note has similar requirements, but as there is only
+%   a single internal function to call the code is less complex.
 %    \begin{macrocode}
-\NewDocumentCommand \bibnotemark { o } {
-  \IfNoValueTF {#1} 
-    {
-      \int_gincr:N \g_@@_note_int
-      \@@_mark_note:x { \@@_note_name: }
-    }
-    { \@@_mark_note:x { \@@_insert_refsection: #1 } }
-}
+\NewDocumentCommand \bibnotemark { o }
+  {
+    \IfNoValueTF {#1}
+      {
+        \int_gincr:N \g_@@_note_int
+        \@@_mark_note:x { \@@_note_name: }
+      }
+      { \@@_mark_note:x { \@@_insert_refsection: #1 } }
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\bibnotetext}
-% As text for a note uses the same number as the preceeding mark,
-% things are slightly less complex here. The basic \texttt{o} argument
-% type is used as this means that full expansion of the note name can
-% take place \enquote{early}.
+% \begin{macro}{\bibnotetext}
+%   As text for a note uses the same number as the preceding mark,
+%   things are slightly less complex here. The basic \texttt{o} argument
+%   type is used as this means that full expansion of the note name can
+%   take place \enquote{early}.
 %    \begin{macrocode}
-\NewDocumentCommand \bibnotetext { o +m } {
-  \IfNoValueTF {#1} 
-    { \@@_write_note:xn { \@@_note_name: } {#2} }
-    { \@@_write_note:xn { \@@_insert_refsection: #1 } {#2} }
-}
+\NewDocumentCommand \bibnotetext { o +m }
+  {
+    \IfNoValueTF {#1}
+      { \notestobib_write_note:xn { \@@_note_name: } {#2} }
+      { \notestobib_write_note:xn { \@@_insert_refsection: #1 } {#2} }
+  }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\recordnotes}
-% A direct call to the internal function: no arguments are needed.
+% \begin{macro}{\recordnotes}
+%   A direct call to the internal function: no arguments are needed.
 %    \begin{macrocode}
-\NewDocumentCommand \recordnotes { } {
-  \@@_record_notes:
-}
+\NewDocumentCommand \recordnotes { }
+  { \@@_record_notes: }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\bibnotesetup}
+% \begin{macro}{\bibnotesetup}
 % A user set up function.
 %    \begin{macrocode}
-\NewDocumentCommand \bibnotesetup { m } {
-  \keys_set:nn { notes2bib } {#1}
-}
+\NewDocumentCommand \bibnotesetup { m }
+  { \keys_set:nn { notes2bib } {#1} }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\begin{macro}{\printbibnotes}
-% A direct translation for the internal function.
+% \begin{macro}{\printbibnotes}
+%   A direct translation for the internal function.
 %    \begin{macrocode}
-\NewDocumentCommand \printbibnotes { } {
-  \@@_print_notes:
-}
+\NewDocumentCommand \printbibnotes { }
+  { \@@_print_notes: }
 %    \end{macrocode}
-%\end{macro}
-%
-%\begin{macro}{\citenote}
-%\changes{v2.0}{2009/09/25}{Depreciated in favour of \cs{bibnotemark}}
-%\begin{macro}{\flushnotestack}
-%\changes{v2.0}{2009/09/28}{Depreciated in favour of 
-%  \cs{recordnotes}}
-%\begin{macro}{\niibsetup}
-%\changes{v2.0}{2009/09/25}{Depreciated in favour of \cs{bibnotesetup}}
-% A few functions which are depreciated in version two.
+% \end{macro}
+%
+% \begin{macro}{\citenote}
+% \begin{macro}{\flushnotestack}
+% \begin{macro}{\niibsetup}
+%   A few functions which are depreciated in version two.
 %    \begin{macrocode}
-\NewDocumentCommand \citenote { m } { 
-  \@@_mark_note:n {#1}
-}
+\NewDocumentCommand \citenote { m }
+  { \@@_mark_note:n {#1} }
 \cs_new_eq:NN \flushnotestack \recordnotes
 \cs_new_eq:NN \niibsetup      \bibnotesetup
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-%\end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
 %
-%\subsection{Auxiliary file functions}
+% \subsection{Auxiliary file functions}
 %
 % \pkg{notes2bib} needs to write information to the \file{aux} file
 % for carrying information between runs. Rather than give them cryptic
 % names, they have long design-level ones. They are also declared
-% as protected functions so that writing to the \file{aux} file is 
+% as protected functions so that writing to the \file{aux} file is
 % easier.
 %
-%\begin{macro}{\NotesAfterCitations}
-%\changes{v2.0b}{2009/01/09}{Define using 
-%  \cs{cs_new_protected_nopar:Npn}}
-%\begin{macro}{\NotesBeforeCitations}
-%\changes{v2.0b}{2009/01/09}{Define using 
-%  \cs{cs_new_protected_nopar:Npn}}
-% The functions to pass information on out-of-order notes from one
-% run to another both add the information to the appropriate lists.
-% For notes before citations, there is also a need to put the 
-% \cs{citation} calls into the \file{aux} file at the correct stage.
+% \begin{macro}{\NotesAfterCitations}
+% \begin{macro}{\NotesBeforeCitations}
+%   The functions to pass information on out-of-order notes from one
+%   run to another both add the information to the appropriate lists.
+%   For notes before citations, there is also a need to put the
+%   \cs{citation} calls into the \file{aux} file at the correct stage.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \NotesAfterCitations #1 {
-  \clist_gput_right:Nn \g_@@_previous_after_clist {#1}
-}
-\cs_new_protected_nopar:Npn \NotesBeforeCitations #1 {
-  \clist_gput_right:Nn \g_@@_previous_after_clist {#1}
-  \tl_gput_right:Nn \g_@@_document_hook_tl { \nocite {#1} }
-}
+\cs_new_protected:Npn \NotesAfterCitations #1
+  { \clist_gput_right:Nn \g_@@_previous_after_clist {#1} }
+\cs_new_protected:Npn \NotesBeforeCitations #1
+  {
+    \clist_gput_right:Nn \g_@@_previous_after_clist {#1}
+    \tl_gput_right:Nn \g_@@_document_hook_tl { \nocite {#1} }
+  }
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-% 
-%\begin{macro}{\TotalNotes}
-%\changes{v2.0b}{2009/01/09}{Define using 
-%  \cs{cs_new_protected_nopar:Npn}}
-% This function allows the total number of bibliography notes to be
-% carried forward from one run to the next.
+% \end{macro}
+% \end{macro}
+%
+% \begin{macro}{\TotalNotes}
+%   This function allows the total number of bibliography notes to be
+%   carried forward from one run to the next.
 %    \begin{macrocode}
-\cs_new_protected_nopar:Npn \TotalNotes #1 {
-  \int_gset:Nn \g_@@_previous_notes_int {#1}
-}
+\cs_new_protected:Npn \TotalNotes #1
+  { \int_gset:Nn \g_@@_previous_notes_int {#1} }
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\subsection{Code at the start of the document}
+% \subsection{Code at the start of the document}
 %
-%\begin{macro}{\g_@@_document_hook_tl}
-% \pkg{notes2bib} needs to be able to carry out a few tasks right at the
-% beginning of the document. To do that, a hook is added to the
-% \cs{document} macro, which can be treated as a token list variable
-% as it has no arguments.
+% \begin{macro}{\g_@@_document_hook_tl}
+%   \pkg{notes2bib} needs to be able to carry out a few tasks right at the
+%   beginning of the document. To do that, a hook is added to the
+%   \cs{document} macro, which can be treated as a token list variable
+%   as it has no arguments.
 %    \begin{macrocode}
 \tl_gput_right:Nn \document { \g_@@_document_hook_tl }
 \tl_new:N \g_@@_document_hook_tl
 %    \end{macrocode}
-%\end{macro}
+% \end{macro}
 %
-%\subsection{Code at end of the document}
+% \subsection{Code at end of the document}
+%
+% There are a few tasks which have to be carried out a the end of
+% the \LaTeX{} run, so that data is available for the next run.
 %
-% There are a few tasks which have to be carried out a the end of 
-% the LaTeX run, so that data is available for the next run.
-% 
 % First, all of the notes need to be added to the auxiliary file.
 % This ensures that the comparisons made in the next step make sense.
 %    \begin{macrocode}
 \AtEndDocument { \@@_record_notes: }
 %    \end{macrocode}
-% 
+%
 % The list of out-of-order notes from the current run needs to match
 % that from the previous run. If not, then there is a need to re-run
-% LaTeX.
+% \LaTeX{}.
 %    \begin{macrocode}
-\AtEndDocument {
-  \tl_if_eq:NNTF \g_@@_all_before_clist \g_@@_previous_before_clist 
-    {
-      \tl_if_eq:NNF \g_@@_all_after_clist \g_@@_previous_after_clist 
-        { \msg_info:nn { notes2bib } { rerun } }
-    }
-    { \msg_info:nn { notes2bib } { rerun } }
-}
-\msg_new:nnn { notes2bib } { rerun } {
-  To~get~notes~in~the~correct~order,~please~run: \\%
-  \c_space_tl 1)~LaTeX  \\
-  \c_space_tl 2)~BibTeX \\
-  \c_space_tl 3)~LaTeX
-}
+\AtEndDocument
+  {
+    \tl_if_eq:NNTF \g_@@_all_before_clist \g_@@_previous_before_clist
+      {
+        \tl_if_eq:NNF \g_@@_all_after_clist \g_@@_previous_after_clist
+          { \msg_info:nn { notes2bib } { rerun } }
+      }
+      { \msg_info:nn { notes2bib } { rerun } }
+  }
+\msg_new:nnn { notes2bib } { rerun }
+  {
+    To~get~notes~in~the~correct~order,~please~run: \\%
+    \c_space_tl 1)~LaTeX  \\
+    \c_space_tl 2)~BibTeX \\
+    \c_space_tl 3)~LaTeX
+  }
 %    \end{macrocode}
-%  
-%\begin{macro}{\@@_write_note_file:}  
-%\begin{macro}{\g_@@_file_iow} 
-%  \changes{v2.0i}{2012/07/16}{Define stream in all cases}
-% The notes themselves are now written in one block: this avoids 
-% using up a stream for any longer than necessary.   
+%
+% \begin{macro}{\@@_write_note_file:}
+% \begin{macro}{\g_@@_file_iow}
+% The notes themselves are now written in one block: this avoids
+% using up a stream for any longer than necessary.
 %    \begin{macrocode}
-\AtEndDocument {
-  \if@filesw
-    \exp_after:wN \@@_write_note_file:
-  \fi:
-}
-\cs_new_protected_nopar:Npn \@@_write_note_file: {
-  \tl_if_empty:NF \g_@@_notes_tl {
-    \iow_open:Nn \g_@@_file_iow { \g_@@_filename_tl .bib }
-    \iow_now:Nx \g_@@_file_iow { \c_@@_file_message_tl }
-    \iow_now:Nx \g_@@_file_iow 
-      { \exp_not:V \g_@@_notes_tl }
-    \iow_close:N \g_@@_file_iow  
+\AtEndDocument
+  {
+    \if@filesw
+      \exp_after:wN \@@_write_note_file:
+    \fi:
+  }
+\cs_new_protected:Npn \@@_write_note_file:
+  {
+    \tl_if_empty:NF \g_@@_notes_tl
+      {
+        \iow_open:Nn \g_@@_file_iow { \g_@@_filename_tl .bib }
+        \iow_now:Nx \g_@@_file_iow { \c_@@_file_message_tl }
+        \iow_now:Nx \g_@@_file_iow { \exp_not:V \g_@@_notes_tl }
+        \iow_close:N \g_@@_file_iow
+      }
   }
-}
 \iow_new:N \g_@@_file_iow
 %    \end{macrocode}
-%\end{macro}
-%\end{macro}
-% 
+% \end{macro}
+% \end{macro}
+%
 % The total number of bibliography notes from the current run is
 % recorded to the \file{aux} file. This will then be picked up in the
 %    \begin{macrocode}
-\AtEndDocument {
-  \int_compare:nNnT \g_@@_note_int > \c_zero
-    {
-      \iow_now:Nx \@auxout 
-        { \TotalNotes { \int_to_arabic:n { \g_@@_note_int } } }
-    }
-}
+\AtEndDocument
+  {
+    \int_compare:nNnT \g_@@_note_int > 0
+      {
+        \iow_now:Nx \@auxout
+          { \TotalNotes { \int_to_arabic:n { \g_@@_note_int } } }
+      }
+  }
 %    \end{macrocode}
 %
-%\subsection{Tidying up}
+% \subsection{Tidying up}
 %
-%\begin{macro}{\thanks}
-% The \cs{thanks} macro has to be replaced by one that uses the original 
-% \cs{footnotemark} and \cs{footnotetext} under all circumstances. This
-% is the kernel definition modified: if an alternative version is in use
-% things may go wrong.
+% \begin{macro}{\thanks}
+%   The \cs{thanks} macro has to be replaced by one that uses the original
+%   \cs{footnotemark} and \cs{footnotetext} under all circumstances. This
+%   is the kernel definition modified: if an alternative version is in use
+%   things may go wrong.
 %    \begin{macrocode}
-\cs_set:Npn \thanks #1 {
-  \@@_footnotemark:w
-  \protected@xdef \@thanks 
-    {
-      \@thanks
-      \protect \@@_footnotetext:w [ \the \c@footnote ] {#1}
-    }
-}
+\cs_set:Npn \thanks #1
+  {
+    \@@_footnotemark:w
+    \protected@xdef \@thanks
+      {
+        \@thanks
+        \protect \@@_footnotetext:w [ \the \c@footnote ] {#1}
+      }
+  }
 %    \end{macrocode}
-%\end{macro}    
+% \end{macro}
 %
 % The final job is to set note placement: this is done here as various
-% parts of the module need to be in place for this to work correctly.    
+% parts of the module need to be in place for this to work correctly.
 %    \begin{macrocode}
 \keys_set:nn { notes2bib } { placement = mixed }
 %    \end{macrocode}
-%    
-% Any load time options are processed.    
+%
+% Any load time options are processed.
 %    \begin{macrocode}
 \ProcessKeysOptions { notes2bib }
 %    \end{macrocode}
-%    
+%
 %    \begin{macrocode}
 %</package>
 %    \end{macrocode}
 %
-%\end{implementation}
+% \end{implementation}
 %
-%\PrintChanges
-%\PrintIndex
\ No newline at end of file
+% \PrintChanges
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/notes2bib/notes2bib.ins b/Master/texmf-dist/source/latex/notes2bib/notes2bib.ins
new file mode 100644
index 00000000000..f0afc4a31f4
--- /dev/null
+++ b/Master/texmf-dist/source/latex/notes2bib/notes2bib.ins
@@ -0,0 +1,76 @@
+%%
+%% This is file `notes2bib.ins',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% notes2bib.dtx  (with options: `install')
+%% ---------------------------------------------------------------
+%% notes2bib --- Integrating notes into the bibliography
+%% Maintained by Joseph Wright
+%% E-mail: joseph.wright@morningstar2.co.uk
+%% Released under the LaTeX Project Public License v1.3c or later
+%% See http://www.latex-project.org/lppl.txt
+%% ---------------------------------------------------------------
+%% 
+\input l3docstrip.tex
+\keepsilent
+\askforoverwritefalse
+\preamble
+---------------------------------------------------------------
+notes2bib --- Integrating notes into the bibliography
+Maintained by Joseph Wright
+E-mail: joseph.wright@morningstar2.co.uk
+Released under the LaTeX Project Public License v1.3c or later
+See http://www.latex-project.org/lppl.txt
+---------------------------------------------------------------
+
+\endpreamble
+\postamble
+
+Copyright (C) 2007-2013,2016,2019 by
+  Joseph Wright <joseph.wright@morningstar2.co.uk>
+
+It may be distributed and/or modified under the conditions of
+the LaTeX Project Public License (LPPL), either version 1.3c of
+this license or (at your option) any later version.  The latest
+version of this license is in the file:
+
+   http://www.latex-project.org/lppl.txt
+
+This work is "maintained" (as per LPPL maintenance status) by
+  Joseph Wright.
+
+This work consists of the file  notes2bib.dtx
+          and the derived files notes2bib.ins,
+                                notes2bib.pdf and
+                                notes2bib.sty.
+
+\endpostamble
+\usedir{tex/latex/notes2bib}
+\generate{
+  \file{\jobname.sty}{\from{\jobname.dtx}{package}}
+}
+\endbatchfile
+ %\section{Introduction}
+%% 
+%% Copyright (C) 2007-2013,2016,2019 by
+%%   Joseph Wright <joseph.wright@morningstar2.co.uk>
+%% 
+%% It may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License (LPPL), either version 1.3c of
+%% this license or (at your option) any later version.  The latest
+%% version of this license is in the file:
+%% 
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% This work is "maintained" (as per LPPL maintenance status) by
+%%   Joseph Wright.
+%% 
+%% This work consists of the file  notes2bib.dtx
+%%           and the derived files notes2bib.ins,
+%%                                 notes2bib.pdf and
+%%                                 notes2bib.sty.
+%% 
+%%
+%% End of file `notes2bib.ins'.