latex2e-20170101/doc/ltnews25.tex

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  29 % Filename: ltnews25.tex
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  31 % This is issue 25 of LaTeX News.
  32
  33 \documentclass{ltnews}
  34 \usepackage[T1]{fontenc}
  35
  36 \usepackage{lmodern,url,hologo}
  37
  38
  39 \publicationmonth{March}
  40 \publicationyear{2016}
  41
  42 \publicationissue{25}
  43
  44 \begin{document}
  45
  46 \maketitle
  47
  48 \section{Lua\TeX}
  49 This \LaTeX\ release sees several internal changes designed to ensure
  50 that the system is still usable with Lua\TeX\ versions greater than
  51 0.80, which have introduced many changes into the engine, most notably
  52 the removal or renaming of most of the primitive commands introduced by
  53 pdf\TeX. Also the lists of Lua callbacks handled by the callback
  54 allocation mechanism has been updated to match the callbacks defined
  55 in Lua\TeX\ version 0.90.
  56
  57 These changes have also required updates in \textsf{tools}
  58 and \textsf{amsmath} as described below.
  59
  60 This is the first release of \LaTeX\ for which the test suite reports
  61 no failures when used with Lua\TeX.
  62
  63 \section{Documentation checksums}
  64 The \package{doc} package has always provided two mechanisms that were
  65 mainly intended to guard against file truncation or corruption when
  66 files were commonly distributed by email through unreliable mail
  67 gateways: a Character Table of the ASCII character set could be
  68 inserted (and checked) and a ``checksum'' (count of the number of
  69 backslashes in the code sections) could be checked.  These features
  70 are not really needed with modern distribution mechanisms and can be a
  71 distraction when reading the source code and so have been removed. The
  72 \package{doc} package has been updated so that if you use a
  73 \verb|\CheckSum| command then, as before, the number is checked;
  74 however, if you omit the command then no error or warning is given.
  75
  76
  77 \section{Updates to \package{inputenc}}
  78
  79 The UTF-8 support in \package{inputenc} has been further extended with
  80 support for non-breaking hyphens and more dashes.
  81
  82 \section{Updates in Tools}
  83
  84 The \package{varioref} package has been updated with improved
  85 documentation of multi\-lingual support, and avoiding unnecessary warnings in
  86 some cases with \verb|\reftextfaraway|.
  87
  88 The \package{tabularx} package's handling of \verb|\endtabularx| in
  89 environment definitions has been fixed to again match its documentation.
  90
  91 The \package{bm} package has been updated as required by the changes
  92 to \verb|\mathchardef| in Lua\TeX.
  93
  94
  95 \section{amsmath}
  96
  97 Since the launch of \LaTeXe\ in 1993, the \textsf{amsmath} bundle has
  98 been part of the \emph{required} packages in the core \LaTeX\
  99 distribution, with bug reports handled by the \LaTeX\ bug database at
 100 \url{https://latex-project.org/bugs-upload.html}.
 101
 102 The \textsf{amsmath} packages and the \textsf{amscls} classes have
 103 been maintained by the American Mathematical Society.
 104
 105 With this release a new arrangement has been agreed between the
 106 American Mathematical Society and the \LaTeX3 project. The \LaTeX3
 107 project will take over maintenance of the \textsf{amsmath} bundle,
 108 with the American Mathematical Society retaining maintenance of
 109 \textsf{amscls}.
 110
 111 The recommended installation of these files in the \TeX\ directory
 112 structure remains unchanged as \path|tex/latex/amsmath| and
 113 \path|tex/latex/amscls| respectively.
 114
 115 This release of \package{amsmath} includes several updates so that
 116 \package{amsmath} does not generate errors when math is used with
 117 Lua\TeX\ v0.87+, which has changes to \verb|\mathchardef| that are
 118 incompatible with the previous version of \package{amsmath}. It also
 119 improves \verb|\dots| handling so that \verb|\long| macros are
 120 correctly handled (for example, \verb|\dots \Rightarrow| now
 121 uses centered dots), as well as commands expanding to character tokens
 122 (for example, \verb|\times \dots \times| will use centered dots with
 123 \verb|\times| defined as in the \package{unicode-math} package).
 124
 125 \section{Related updates}
 126 In addition to the updates in the core \LaTeX\ release, some files in
 127 the CTAN ``contrib'' area have also been updated. Notably there have
 128 been further updates to the \textsf{unicode-data} files; also, the
 129 files required to build plain and \LaTeX\ formats have now been
 130 submitted to CTAN as \textsf{tex-ini-files}. The
 131 addition of a new \texttt{luatex} option for \textsf{graphics}-related
 132 packages (\textsf{luatex-def} on CTAN) has required updates to the
 133 configuration files to select a
 134 default option and these have similarly been uploaded to CTAN as
 135 \textsf{graphics-cfg}. (Previously these files were maintained
 136 directly in the \TeX\ Live repository, and were not available on CTAN.)
 137 \end{document}