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-rw-r--r--Master/texmf-dist/source/latex-dev/base/ltmiscen.dtx13
1 files changed, 11 insertions, 2 deletions
diff --git a/Master/texmf-dist/source/latex-dev/base/ltmiscen.dtx b/Master/texmf-dist/source/latex-dev/base/ltmiscen.dtx
index c7254ad3532..939bd51a2da 100644
--- a/Master/texmf-dist/source/latex-dev/base/ltmiscen.dtx
+++ b/Master/texmf-dist/source/latex-dev/base/ltmiscen.dtx
@@ -1,7 +1,7 @@
% \iffalse meta-comment
%
% Copyright (C) 1993-2021
-% The LaTeX3 Project and any individual authors listed elsewhere
+% The LaTeX Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
@@ -32,7 +32,7 @@
%<*driver>
% \fi
\ProvidesFile{ltmiscen.dtx}
- [2020/12/18 v1.1x LaTeX Kernel (Misc. Environments)]
+ [2021/02/08 v1.1y LaTeX Kernel (Misc. Environments)]
% \iffalse
\documentclass{ltxdoc}
\GetFileInfo{ltmiscen.dtx}
@@ -868,6 +868,15 @@
%<latexrelease> \expandafter\endgroup\if@endpe\@doendpe\fi
%<latexrelease> \if@ignore\@ignorefalse\ignorespaces\fi}
%<latexrelease>
+% \end{macrocode}
+% Also undo the internal commands as some packages unfortunately test
+% for their existence instead of using \cs{IfFormatAtLeastTF}.
+% \changes{v1.1y}{2021/02/08}{Undo the internals for robust \cs{begin}
+% and \cs{end} in rollback (gh/494)}
+% \begin{macrocode}
+%<latexrelease>\expandafter\let\csname begin \endcsname\@undefined
+%<latexrelease>\expandafter\let\csname end \endcsname\@undefined
+%<latexrelease>
%<latexrelease>\EndIncludeInRelease
%<*2ekernel>
% \end{macrocode}