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diff --git a/Master/texmf-dist/source/latex-dev/base/ltnews30.tex b/Master/texmf-dist/source/latex-dev/base/ltnews30.tex new file mode 100644 index 00000000000..7b4b282cc9e --- /dev/null +++ b/Master/texmf-dist/source/latex-dev/base/ltnews30.tex @@ -0,0 +1,297 @@ +% \iffalse meta-comment +% +% Copyright 2019 +% The LaTeX3 Project and any individual authors listed elsewhere +% in this file. +% +% This file is part of the LaTeX base system. +% ------------------------------------------- +% +% It may be distributed and/or modified under the +% conditions of the LaTeX Project Public License, either version 1.3c +% of this license or (at your option) any later version. +% The latest version of this license is in +% http://www.latex-project.org/lppl.txt +% and version 1.3c or later is part of all distributions of LaTeX +% version 2005/12/01 or later. +% +% This file has the LPPL maintenance status "maintained". +% +% The list of all files belonging to the LaTeX base distribution is +% given in the file `manifest.txt'. See also `legal.txt' for additional +% information. +% +% The list of derived (unpacked) files belonging to the distribution +% and covered by LPPL is defined by the unpacking scripts (with +% extension .ins) which are part of the distribution. +% +% \fi +% Filename: ltnews30.tex +% +% This is issue 30 of LaTeX News. + +\documentclass{ltnews} +\usepackage[T1]{fontenc} + +\usepackage{lmodern,url,hologo} + +\usepackage{csquotes} + +\providecommand\acro[1]{\textsc{#1}} +\providecommand\meta[1]{$\langle$\textit{#1}$\rangle$} + + +\providecommand\XeTeX{\hologo{XeTeX}} +\providecommand\LuaTeX{\hologo{LuaTeX}} +\providecommand\pdfTeX{\hologo{pdfTeX}} + +\providecommand\githubissue[2][]{\ifhmode\unskip\fi + \quad\penalty500\strut\nobreak\hfill + \mbox{\small\slshape(% + \href{https://github.com/latex3/latex2e/issues/\getfirstgithubissue#2 \relax}% + {github issue#1 #2}% + )}% + \par} + +% simple solution right now (just link to the first issue if there are more) +\def\getfirstgithubissue#1 #2\relax{#1} + +\providecommand\sxissue[1]{\ifhmode\unskip\fi + \quad\penalty500\strut\nobreak\hfill + \mbox{\small\slshape(\url{https://tex.stackexchange.com/#1})}\par} + +\providecommand\gnatsissue[2]{\ifhmode\unskip\fi + \quad\penalty500\strut\nobreak\hfill + \mbox{\small\slshape(% + \href{https://www.latex-project.org/cgi-bin/ltxbugs2html?pr=#1\%2F#2}% + {gnats issue #1/#2}% + )}% + \par} + +\let\cls\pkg +\providecommand\env[1]{\texttt{#1}} + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +\iffalse % only for TUB production +\usepackage{graphicx} +\makeatletter +% Xe\TeX{} requires reflecting the first E, hence we complain if the +% graphics package is not present. (For plain documents, this can be +% loaded via Eplain.) Also, at Barbara's suggestion, if the current +% font is slanted, we rotate by 180 instead of reflecting so there is at +% least a chance to look ok. (The magic values here seem more or less +% ok for \texttt{cmsl} and \texttt{cmti}.) +% +% \begin{macrocode} +\def\tubreflect#1{% + \@ifundefined{reflectbox}{% + \TBerror{A graphics package must be loaded for \string\XeTeX}% + }{% + \ifdim \fontdimen1\font>0pt + \raise 1.6ex \hbox{\kern.1em\rotatebox{180}{#1}}\kern-.1em + \else + \reflectbox{#1}% + \fi + }% +} +\def\tubhideheight#1{\setbox0=\hbox{#1}\ht0=0pt \dp0=0pt \box0 } +\def\XekernbeforeE{-.125em} +\def\XekernafterE{-.1667em} +\DeclareRobustCommand{\Xe}{\leavevmode + \tubhideheight{\hbox{X% + \setbox0=\hbox{\TeX}\setbox1=\hbox{E}% + \ifdim \fontdimen1\font>0pt \def\XekernbeforeE{0em}\fi + \lower\dp0\hbox{\raise\dp1\hbox{\kern\XekernbeforeE\tubreflect{E}}}% + \kern\XekernafterE}}} +\def\XeTeX{\Xe\TeX} +\def\XeLaTeX{\Xe{\kern.11em \LaTeX}} +\fi +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +\publicationmonth{Pre-release Version --- unfinished} +\publicationyear{2019} + +\publicationissue{30} + +\begin{document} + +%\addtolength\textheight{4.2pc} % only for TUB + +\maketitle +\tableofcontents + +\setlength\rightskip{0pt plus 3em} + +\bigskip + +\section{Introduction} + +This document is under construction \ldots + + +\section{Improving Unicode handling in \pdfTeX{}} + +The perhaps most important improvement in this release is an even +better support for UTF-8 characters when using \pdfTeX{}.\footnote{The + Japanese engines e-p\TeX{} and e-up\TeX{} can't use these features + yet as they don't support the primitive \cs{ifincsname}. Work is + under way to resolve this in the engines.} + +In Unicode engines any Unicode character (that is not acting as a +command, i.e., is \enquote{active}) can be used as part of the +\cs{label}/\cs{ref} mechanism or can be displayed in a message or +written to a file. In 8-bit engines, however, this was severely +restricted, essentially you had to limit yourself to using +\acro{ascii} letters, digits and a few punctuation symbols. With the +new release most of these restrictions have been removed and you now +can write labels such as +\begin{verbatim} + \label{eq:größer} +\end{verbatim} +or use accented characters, etc.\ as part of a \cs{typeout} message. +The only requirement remaining is that only those UTF-8 characters +that are also available for typesetting can be used, i.e., only those +which which adequate font support is loaded. Otherwise you will get an +error message stating that a particular Unicode character is not set +up for use with \LaTeX{}. + +What is not possible with an 8-bit engine such as \pdfTeX{} is to use +characters other than \acro{ascii} letters as part of a command +name. This is due to the fact that all other characters in such +engines are not single character tokens, but in fact consist of a +sequence of bytes and this is not supported in command names. + +\section{Improving file name handling in \pdfTeX{}} + +A related change is that file names used as part of \cs{input}, \cs{includegraphics}, etc.\ can now contain Unicode characters as well as spaces. In this case even characters that can't be typeset because of missing font support can be used. + + + + +\section{Other changes to the \LaTeX{} kernel} + + +\subsection{Guard against \cs{unskip} at the start of a tabular cell} + +If a \env{tabular} or \env{array} cell started with command that +issued an \cs{unskip} as its first action centering the column got +broken because the space on the left got removed. This got corrected +by adding a minuscule additional space after the stretching space that +could be safely removed in such a case without being noticeable. + +This change was also applied in the \pkg{array} package. + +\githubissue{102} + + +\subsection{Fixes to Unicode table data} + +\texttt{U+012F} which is \enquote{i with ogonek} should produce an +\enquote{i} and not a\enquote{dotless i}. This has been corrected. + +\githubissue{122} + +The Unicode slots \texttt{27E8} and \texttt{27E9} have been mapped to +\cs{textlangle} and \cs{textrangle} which is the recommended mapping. + +\githubissue{110} + +When doing cut-and-paste from other documents f-ligatures might show +up as Unicode characters. In the past those got rejected. We now +translate them back to individual characters so that they get +accepted. If supported by the font (which is normally the case) they +are then reconstructed as ligatures and thus come out as +desired. Otherwise they will come out as individual characters which +is fine too. + +\githubissue{154} + + +\subsection{Improve \cs{InputIfFileExists}'s handling of file names} + +In rare circumstances it was possible that \cs{InputIfFileExists} +would work incorrectly, e.g., a construction such as +\begin{verbatim} +\InputIfFileExists{foo}{\input{bar}}{} +\end{verbatim} +Would not load the files \texttt{foo.tex} and \texttt{bar.tex} but +would load \texttt{foo.tex} twice. This has been corrected. + +\githubissue{109} + + +\subsection{Improve wording of a warning message} + +\emph{write} + +\githubissue{107} + + +\subsection{Avoid \cs{DeclareErrorFont} side effects} + +\emph{write} + +\gnatsissue{latex}{4399} + + + +\subsection{\pkg{nfssfont}: Generate a font table as the default action} + +With the small file \texttt{nfssfont.tex} it is possible to produce +font tables and other font tests in the style set up by Don Knuth. As +in nearly all cases producing a font table is the desired action this +action has been made the default so that one can simply hit enter +instead of having to write \verb=\table\bye=. + + + + + + +\section{Changes to packages in the \pkg{tools} category} + +\subsection{\pkg{multicol}: Introduce \texttt{minrows} counter for balancing} + +When there are only a few lines of text on a page at the end of a +\env{multicols} environment balancing them looks rather odd, e.g., if +you then end up with three columns each containing a single line. This +can now be controlled through the counter \texttt{minrows} (default is +1) which requires at least that many lines in the first column during +balancing. Thus, if you set it to \texttt{2} one would get a +distribution of \texttt{2+1+0} lines and if set it to three, the result +would have been \texttt{3+0+0} instead of the default \texttt{1+1+1}. + +What is most appropriate really depends on the circumstances, but this +now gives you the tools to make local or global adjustments. + + + +\section{Changes to packages in the \pkg{amsmath} category} + +\subsection{\pkg{amsmath}: Introduce \texttt{overunderset} command} + +\emph{describe} + + + +\section{Documentation updates} + +\subsection{High-lighting the standard NFSS codes for series} + +\emph{describe} + + +\begin{thebibliography}{9} + +\bibitem{29:site-doc} + \emph{\LaTeX{} documentation on the \LaTeX{} Project Website}.\\ + \url{https://latex-project.org/documentation/} + +\bibitem{29:site-pub} + \emph{\LaTeX{} Project publications on the \LaTeX{} Project Website}.\\ + \url{https://latex-project.org/publications/} + +\end{thebibliography} + +\end{document} + |