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diff --git a/language/japanese/platex-tools/plextdelarray.sty b/language/japanese/platex-tools/plextdelarray.sty
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-%
-% plextdelarray.sty
-% written by Hironobu Yamashita (@aminophen)
-%
-% This package is part of the platex-tools bundle.
-% https://github.com/aminophen/platex-tools
-%
-% This package is expected to be compatible with
-% * delarray.sty in latex-tools
-% (2014/10/28 v1.01)
-% * plext.sty in platex
-% (2001/09/26 v1.2 -- 2020/10/07 v1.2m)
-%
-
-\NeedsTeXFormat{pLaTeX2e}
-\ProvidesPackage{plextdelarray}
- [2018/09/18 v1.0a array delimiter package for plext and delarray]
-\RequirePackage{plextarray}
-\RequirePackage{delarray}
-
-%% patching internal code for array.sty and plext.sty
-%
-\def\@tabarray{\@ifnextchar<\p@tabarray{\p@tabarray<Z>}}
-%
-%% adopt from \p@tabarray (from plext.sty)
-\def\p@tabarray<#1>{\m@th\@ifnextchar[%]
- {\p@@array<#1>}{\p@@array<#1>[c]}}
-%
-%% adopt from \@@array (from delarray.sty)
-\def\p@@array<#1>[#2]{\@ifnextchar\bgroup
- {\let\@arrayleft\relax\let\@arrayright\relax\p@array<#1>[#2]}%
- {\p@del@array<#1>[#2]}}
-%
-%% adopt from \@del@array (from delarray.sty)
-% Note: we can't use \unvbox\z@, because there is a possibility
-% that \@arrayleft is followed by \raise etc, instead of
-% a box-starting command (\vtop, \vbox etc).
-% Otherwise, an error "! A <box> was supposed to be here."
-% See definitions of \@begin@alignbox in \fork@array@option.
-\def\p@del@array<#1>[#2]#3#4#5{%
- \setbox\z@\hbox{$\left#3\right#5$}%
- \if#2c\def\@arrayleft{\left#3}\def\@arrayright{\right#5}%
- \else\def\@arrayleft{\setbox\z@=\hbox\bgroup}% !!!
- \def\@arrayright{\egroup% !!!
- \dimen@=\dp\z@
- \advance\dimen@-\ht\z@
- \divide \dimen@ by \tw@
- \advance\dimen@ by\fontdimen22 \textfont\tw@
- \lower\dimen@\hbox{$\left#3\vcenter{\box\z@}\right#5$}}% !!!
- \fi
- \p@array<#1>[#2]{#4}}
-%
-%% all done
-
-\endinput