From 2773132ea593028dafe764f7560fd94ecb827d3d Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Wed, 20 Jul 2022 03:00:57 +0000
Subject: CTAN sync 202207200300

---
 macros/latex/contrib/fixdif/fixdif.dtx | 53 ++++++++++++++++++----------------
 1 file changed, 28 insertions(+), 25 deletions(-)

(limited to 'macros/latex/contrib/fixdif/fixdif.dtx')

diff --git a/macros/latex/contrib/fixdif/fixdif.dtx b/macros/latex/contrib/fixdif/fixdif.dtx
index 43337e7f88..34d709b9ab 100644
--- a/macros/latex/contrib/fixdif/fixdif.dtx
+++ b/macros/latex/contrib/fixdif/fixdif.dtx
@@ -19,7 +19,7 @@
 % This work consists of the files fixdif.dtx,
 %           and the derived files fixdif.ins,
 %                                 fixdif.sty,
-%                                 fixdef.pdf,
+%                                 fixdif.pdf,
 %                             and README.md.
 %
 %<*internal>
@@ -35,13 +35,16 @@ The basic commands are:
 
 - `\d`: for differential operator "d" in math mode and under-dot accent in text;
 - `\partial`: a "fixed" partial differential operator command;
-- `\letdif`: an interface for defining new commands for differential operators.
+- `\letdif`: an interface for defining new commands for differential operators;
+- `\mathdif`: a commmand in math mode, you can use it just like `\mathop`, etc.
 
 See `fixdif.pdf` for more. Happy TeXing!
 
 ## License
 
-This work may be distributed and/or modified under the conditions of the [LaTeX Project Public License](http://www.latex-project.org/lppl.txt), either version 1.3c of this license or (at your option) any later version.
+This work may be distributed and/or modified under the conditions of 
+the [LaTeX Project Public License](http://www.latex-project.org/lppl.txt), 
+either version 1.3c of this license or (at your option) any later version.
 
 ------
 
@@ -81,7 +84,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
   This work consists of the files fixdif.dtx,
             and the derived files fixdif.ins,
                                   fixdif.sty,
-                                  fixdef.pdf,
+                                  fixdif.pdf,
                               and README.md.
 
 \endpreamble
@@ -126,7 +129,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 %</internal>
 %
 %<*driver>
-\ProvidesFile{fixdif.dtx}[2022/07/14 (c) Copyright 2022 by Zhang Tingxuan]
+\ProvidesFile{fixdif.dtx}[2022/7/19 (c) Copyright 2022 by Zhang Tingxuan]
 \documentclass{ltxdoc}
 
 \usepackage{xcolor}
@@ -145,7 +148,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 
 \title{The \pkg{fixdif} Package}
 \author{Zhang Tingxuan}
-\date{2022/07/14\quad Version 1.3\thanks{\url{https://github.com/AlphaZTX/fixdif}}}
+\date{2022/7/19\quad Version 1.3a\thanks{\url{https://github.com/AlphaZTX/fixdif}}}
 
 \usepackage{hyperref}
 \hypersetup{
@@ -227,7 +230,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % \renewcommand\d{\mathop{\mathrm{d}}\!}
 % \end{Verbatim}
 % This macro works well in ``display math'' and ``text math'', but we still 
-% face three problems:
+% face the following three problems:
 % \begin{enumerate}
 % \item The skip before ``d'' would still be reserved in ``text fraction'', 
 % which is regarded bad. For example, |$\d y/\d x$| produces 
@@ -264,12 +267,12 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % If you are using \pkg{unicode-math} package with \XeTeX/\LuaTeX{} 
 % in your document, you must pay attention to the following items:
 % \begin{itemize}
-% \item If you want to \pkg{amsmath} package, make sure that the 
+% \item If you want to use \pkg{amsmath} package, make sure that the 
 % \pkg{unicode-math} package is loaded \emph{after} \pkg{amsmath}. 
 %
 % \item You had better specify the math font through the \cs{setmathfont} 
-% provided by \pkg{unicode-math} in order to avoid bad skip in text fraction 
-% like $\d y/\d x$.
+% command provided by \pkg{unicode-math} in order to avoid bad skip in  
+% text fraction like $\d y/\d x$.
 %
 % \item Load the \pkg{fixdif} package \emph{after} \pkg{unicode-math}.
 % \end{itemize}
@@ -289,8 +292,8 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % \subsection{Basic commands and package options}
 % \DescribeMacro{\d}
 % The \pkg{fixdif} package provides a \cs{d} command for the differential 
-% operator ``d'' in math mode. When in the text, \cs{d} behaves 
-% just like the old \cs{d} command in \LaTeX{} or plain \TeX{} as an 
+% operator ``d'' in math mode. When in text, \cs{d} behaves just like 
+% the old \cs{d} command in \LaTeX{} or plain \TeX{} as an 
 % accent command. For example, 
 % \begin{Verbatim}
 % $\d x$ and \d x
@@ -299,7 +302,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 %
 % \paragraph{Set the font of \cs{d}}
 % There are two basic package options to control the \cs{d}'s style in math 
-% mode~--- \opt{rm} and \opt{normal}. The default option is \opt{rm}, in whose 
+% mode~--- \opt{rm} and \opt{normal}. The default option is \opt{rm}, in which 
 % case |$f(x)\d x$| produces $f(x)\d x$. If you chose the \opt{normal} option, 
 % for example
 % \begin{Verbatim}
@@ -309,7 +312,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 %
 % \DescribeMacro{\resetdfont}
 % Besides the previous two optional fonts, you can reset the font of 
-% differential operator ``d'' through \cs{resetdfont} command:
+% differential operator ``d'' through \cs{resetdfont} command in preamble:
 % \begin{Verbatim}
 % \resetdfont{\mathsf}
 % \end{Verbatim}
@@ -333,12 +336,12 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % \hfill(preamble only)
 %
 % The \cs{letdif} command has two arguments~--- the first is the newly-defined 
-% command and the second is the \emph{name} of a \emph{single} character 
-% command (without the backslash on the front). For example,
+% command and the second is the control sequence \emph{name} of a math character, 
+% that is, a command without its backslash. For example,
 % \begin{Verbatim}
 % \letdif{\vr}{delta}
 % \end{Verbatim}
-% then the |\vr| will produce a $\delta$ (|\delta|) with automatic skip 
+% then |\vr| will produce a $\delta$ (|\delta|) with automatic skip 
 % before it.
 %
 % Through the \cs{letdif} command, we can redefine a math character command 
@@ -393,8 +396,8 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % If your second argument contains only one command like |\Delta|, 
 % it's recommended to use \cs{letdif} or \cs{letdif*} instead.
 %
-% These two commands will check whether \meta{cmd} has been defined already. 
-% If so, an error message will be given.
+% \cs{newdif} and \cs{newdif*} will check whether \meta{cmd} has been defined 
+% already. If so, an error message will be given.
 %
 % \noindent\textcolor{titlecolor}{\cs{renewdif}\marg{cmd}\marg{multi-cmd}}\DescribeMacro{\renewdif}
 % \hfill(without correction, preamble only)\\
@@ -449,11 +452,11 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % produces $\Delta$.
 %
 % \paragraph{Dealing with ``$+$'' and ``$-$''}
-% If you input \verb|$-\d x$|, you'll get ``$-\d x$'' in your document, 
-% but compared to ``$-\d x$'', ``$-{\d x}$'' is better. To get ``$-{\d x}$'', 
-% you can input \verb|-{\d x}|. The ``\verb|\d x|'' in a \emph{group} will be 
-% regarded \textsl{ordinary} but not \textsl{inner}
-% so that the small skip will disappear.
+% If you input \verb|$-\d x$|, you'll get ``$-\d x$'' in your document. 
+% However, if you think ``$-{\d x}$'' is better, you can input 
+% \verb|-{\d x}|. The ``\verb|\d x|'' in a \emph{group} will be 
+% regarded \textsl{ordinary} but not \textsl{inner} so that the 
+% small skip will disappear. Maybe ``$-\d x$'' is just okay.
 %
 % \section{The source code}
 %    \begin{macrocode}
@@ -462,7 +465,7 @@ Copyright (C) 2022 by Zhang Tingxuan <alphaztx@163.com>.
 % Check the \TeX{} format and provides the package name.
 %    \begin{macrocode}
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{fixdif}[2022/07/14 Interface for defining the differential operators.]
+\ProvidesPackage{fixdif}[2022/7/19 Interface for defining differential operators.]
 %    \end{macrocode}
 % 
 % \subsection{Control the skip between slashes and differential operator}
-- 
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