latex-dev (22oct21)

git-svn-id: svn://tug.org/texlive/trunk@60842 c570f23f-e606-0410-a88d-b1316a301751

22 files changed, 455 insertions, 79 deletions

diff --git a/Master/texmf-dist/tex/latex-dev/base/article.cls b/Master/texmf-dist/tex/latex-dev/base/article.cls
index 5b41ddfbbdd..721b5f5277e 100644
--- a/Master/texmf-dist/tex/latex-dev/base/article.cls
+++ b/Master/texmf-dist/tex/latex-dev/base/article.cls
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1995/12/01]
 \ProvidesClass{article}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
  Standard LaTeX document class]
 \newcommand\@ptsize{}
 \newif\if@restonecol
diff --git a/Master/texmf-dist/tex/latex-dev/base/bk10.clo b/Master/texmf-dist/tex/latex-dev/base/bk10.clo
index 61467c423d7..01f4e768bf1 100644
--- a/Master/texmf-dist/tex/latex-dev/base/bk10.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/bk10.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{bk10.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xpt\@xiipt
diff --git a/Master/texmf-dist/tex/latex-dev/base/bk11.clo b/Master/texmf-dist/tex/latex-dev/base/bk11.clo
index 4676a822495..6721e8a9bb5 100644
--- a/Master/texmf-dist/tex/latex-dev/base/bk11.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/bk11.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{bk11.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xipt{13.6}%
diff --git a/Master/texmf-dist/tex/latex-dev/base/bk12.clo b/Master/texmf-dist/tex/latex-dev/base/bk12.clo
index 3363b912b39..3431015fd3b 100644
--- a/Master/texmf-dist/tex/latex-dev/base/bk12.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/bk12.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{bk12.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xiipt{14.5}%
diff --git a/Master/texmf-dist/tex/latex-dev/base/book.cls b/Master/texmf-dist/tex/latex-dev/base/book.cls
index e073de5a533..10fec30421a 100644
--- a/Master/texmf-dist/tex/latex-dev/base/book.cls
+++ b/Master/texmf-dist/tex/latex-dev/base/book.cls
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1995/12/01]
 \ProvidesClass{book}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
  Standard LaTeX document class]
 \newcommand\@ptsize{}
 \newif\if@restonecol
diff --git a/Master/texmf-dist/tex/latex-dev/base/doc.sty b/Master/texmf-dist/tex/latex-dev/base/doc.sty
index 444849f2e76..b0fe0860f01 100644
--- a/Master/texmf-dist/tex/latex-dev/base/doc.sty
+++ b/Master/texmf-dist/tex/latex-dev/base/doc.sty
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1994/12/01]
  \ProvidesPackage{doc}
-  [2021/05/28 v2.1n
+  [2021/10/04 v2.1n
    Standard LaTeX documentation package (FMi)]
 %%
 %% Package `doc' to use with LaTeX 2e
diff --git a/Master/texmf-dist/tex/latex-dev/base/fleqn.clo b/Master/texmf-dist/tex/latex-dev/base/fleqn.clo
index 9e7256d4e20..e5d93807821 100644
--- a/Master/texmf-dist/tex/latex-dev/base/fleqn.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/fleqn.clo
@@ -104,6 +104,7 @@
 \renewenvironment{eqnarray}{%
     \stepcounter{equation}%
     \def\@currentlabel{\p@equation\theequation}%
+    \def\@currentcounter{equation}%
     \global\@eqnswtrue\m@th
     \global\@eqcnt\z@
     \tabskip\mathindent
diff --git a/Master/texmf-dist/tex/latex-dev/base/latex.ltx b/Master/texmf-dist/tex/latex-dev/base/latex.ltx
index 4580afeec0e..54ca1a8d465 100644
--- a/Master/texmf-dist/tex/latex-dev/base/latex.ltx
+++ b/Master/texmf-dist/tex/latex-dev/base/latex.ltx
@@ -692,7 +692,7 @@
 \def\fmtname{LaTeX2e}
 \edef\fmtversion
    {2021-11-15}
-\def\patch@level{-2}
+\def\patch@level{-3}
 \edef\development@branch@name{develop \the\year-\the\month-\the\day}
 \iffalse
 \def\reserved@a#1/#2/#3\@nil{%
@@ -4305,8 +4305,8 @@
 \ExplSyntaxOff
 
 %%% From File: lthooks.dtx
-\def\lthooksversion{v1.0r}
-\def\lthooksdate{2021/09/06}
+\def\lthooksversion{v1.0s}
+\def\lthooksdate{2021/09/28}
 \ExplSyntaxOn
 \bool_new:N \g__hook_debug_bool
 \cs_new_eq:NN \__hook_debug:n \use_none:n
@@ -5587,14 +5587,19 @@
 %% File: ltcmdhooks.dtx (C) Copyright 2020-2021
 %%       Frank Mittelbach, Phelype Oleinik, LaTeX Team
 %%% From File: ltcmdhooks.dtx
-\def\ltcmdhooksversion{v1.0d}
-\def\ltcmdhooksdate{2021/08/25}
+\def\ltcmdhooksversion{v1.0f}
+\def\ltcmdhooksdate{2021/10/20}
 \ExplSyntaxOn
 \tl_new:N \g_hook_patch_action_list_tl
 \int_new:N \l__hook_patch_num_args_int
 \tl_new:N \l__hook_patch_prefixes_tl
-\tl_new:N \l__hook_patch_param_text_tl
-\tl_new:N \l__hook_patch_replacement_tl
+\tl_new:N \l__hook_param_text_tl
+\tl_new:N \l__hook_replace_text_tl
+\tl_const:Nn \c__hook_hash_tl { # # }
+\cs_new_eq:NN \__hook_exp_not:NN ?
+\cs_new_eq:NN \__hook_def_cmd:w ?
+\quark_new:N \q__hook_recursion_tail
+\quark_new:N \q__hook_recursion_stop
 \prop_new:N \g__hook_delayed_patches_prop
 \cs_new_protected:Npn \__hook_patch_debug:x #1
   { \__hook_debug:n { \iow_term:x { [lthooks]~#1 } } }
@@ -5725,19 +5730,40 @@
       }
     \int_compare:nNnTF { \l__hook_patch_num_args_int } > { \c_zero_int }
       {
-        \tl_set:Nx \l__hook_patch_param_text_tl
-          { \bool_if:NTF #1 { [####1] } {  ####1  } }
-        \tl_set:Nx \l__hook_patch_replacement_tl
-          { \bool_if:NTF #1 { [####1] } { {####1} } }
+        \tl_set:Nx \l__hook_tmpa_tl { \bool_if:NTF #1 { [ ] } { { } } }
         \int_step_inline:nnn { 2 } { \l__hook_patch_num_args_int }
+          { \tl_put_right:Nn \l__hook_tmpa_tl { { } } }
+        \exp_args:NNo \exp_args:No \__hook_if_has_hash:nTF
+            { \exp_after:wN #2 \l__hook_tmpa_tl }
+          { \cs_set_eq:NN \__hook_exp_not:n \exp_not:n }
+          { \cs_set_eq:NN \__hook_exp_not:n \use:n }
+        \cs_set_protected:Npn \__hook_tmp:w ##1 ##2
           {
-            \tl_put_right:Nn \l__hook_patch_param_text_tl    { ## ####1 }
-            \tl_put_right:Nn \l__hook_patch_replacement_tl { { ## ####1 } }
+            ##1 \l__hook_param_text_tl   { \use:n ##2 }
+            ##1 \l__hook_replace_text_tl { \__hook_exp_not:n {##2} }
           }
+        \bool_if:NTF #1
+          { \__hook_tmp:w \tl_set:Nx { [ \c__hook_hash_tl 1 ] } }
+          { \__hook_tmp:w \tl_set:Nx { { \c__hook_hash_tl 1 } } }
+        \int_step_inline:nnn { 2 } { \l__hook_patch_num_args_int }
+          { \__hook_tmp:w \tl_put_right:Nx { { \c__hook_hash_tl ##1 } } }
+        \tl_set:Nx \l__hook_replace_text_tl
+          { \exp_not:N #2 \exp_not:V \l__hook_replace_text_tl }
+        \tl_set:Nx \l__hook_replace_text_tl
+          {
+            \token_if_eq_meaning:NNTF \__hook_exp_not:n \exp_not:n
+              { \exp_args:NNV \exp_args:No \__hook_double_hashes:n }
+              { \exp_args:NV \exp_not:o }
+                  \l__hook_replace_text_tl
+          }
+        \cs_set_eq:NN \__hook_def_cmd:w \tex_gdef:D
+        \cs_set_eq:NN \__hook_exp_not:NN \prg_do_nothing:
       }
       {
-        \tl_clear:N \l__hook_patch_param_text_tl
-        \tl_clear:N \l__hook_patch_replacement_tl
+        \tl_clear:N \l__hook_param_text_tl
+        \tl_set_eq:NN \l__hook_replace_text_tl #2
+        \cs_set_eq:NN \__hook_def_cmd:w \tex_xdef:D
+        \cs_set:Npn \__hook_exp_not:NN ##1 { \exp_not:N ##1 \exp_not:N }
       }
     \group_begin:
       \int_set:Nn \tex_escapechar:D { `\/ }
@@ -5749,18 +5775,22 @@
         }
     \use:x
       {
-        \l__hook_patch_prefixes_tl \tex_def:D
-            \exp_not:N #2 \exp_not:V \l__hook_patch_param_text_tl
-          {
-            \str_if_eq:nnT {#4} { before }
-              { \exp_not:N \UseHook { cmd / #3 / #4 } }
-            \exp_args:No \exp_not:o
-              { \exp_after:wN #2 \l__hook_patch_replacement_tl }
-            \str_if_eq:nnT {#4} { after }
-              { \exp_not:N \UseHook { cmd / #3 / #4 } }
-          }
+        \__hook_redefine_with_hooks:Nnnn \exp_not:N #2
+        \str_if_eq:nnTF {#4} { after }
+          { \use_ii_i:nn }
+          { \use:nn }
+            { { \__hook_exp_not:NN \exp_not:N \UseHook { cmd / #3 / #4 } } }
+            { { } }
+            { \__hook_exp_not:NN \exp_not:V \l__hook_replace_text_tl }
       }
   }
+\cs_new_protected:Npn \__hook_redefine_with_hooks:Nnnn #1 #2 #3 #4
+  {
+    \l__hook_patch_prefixes_tl
+      \exp_after:wN \__hook_def_cmd:w
+        \exp_after:wN #1 \l__hook_param_text_tl
+      { #2  #4  #3 }
+  }
 \cs_new:Npn \__hook_make_prefixes:w / #1 /
   {
     \tl_if_empty:nF {#1}
@@ -5769,6 +5799,58 @@
         \__hook_make_prefixes:w /
       }
   }
+\prg_new_conditional:Npnn \__hook_if_has_hash:n #1 { TF }
+  { \__hook_if_has_hash:w #1 ## \s__hook_mark }
+\cs_new:Npn \__hook_if_has_hash:w #1
+  {
+    \tl_if_single_token:nTF {#1}
+      {
+        \token_if_eq_catcode:NNTF ## #1
+          { \__hook_if_has_hash_check:w }
+          { \__hook_if_has_hash:w }
+      }
+      { \__hook_if_has_hash:w #1 }
+  }
+\cs_new:Npn \__hook_if_has_hash_check:w #1 \s__hook_mark
+  { \tl_if_empty:nTF {#1} { \prg_return_false: } { \prg_return_true: } }
+\cs_new:Npn \__hook_double_hashes:n #1
+  { \__hook_double_hashes:w #1 \q__hook_recursion_tail \q__hook_recursion_stop }
+\cs_new:Npn \__hook_double_hashes:w #1 \q__hook_recursion_stop
+  {
+    \tl_if_head_is_N_type:nTF {#1}
+      { \__hook_double_hashes_output:N }
+      {
+        \tl_if_head_is_group:nTF {#1}
+          { \__hook_double_hashes_group:n }
+          { \__hook_double_hashes_space:w }
+      }
+    #1 \q__hook_recursion_stop
+  }
+\cs_new:Npn \__hook_double_hashes_output:N #1
+  {
+    \if_meaning:w \q__hook_recursion_tail #1
+      \__hook_double_hashes_stop:w
+    \fi:
+    \if_meaning:w \c__hook_hash_tl #1
+      \use_i:nnnn
+    \fi:
+    \use:n
+      {
+        \if_catcode:w ## \exp_not:N #1
+          \exp_after:wN \use_ii:nnnn
+        \fi:
+        \use_none:n
+          { \exp_not:n { #1 #1 } }
+      }
+    \exp_not:N #1
+    \__hook_double_hashes:w
+  }
+\cs_new:Npn \__hook_double_hashes_stop:w #1 \q__hook_recursion_stop { \fi: }
+\cs_new:Npn \__hook_double_hashes_group:n #1
+  { { \__hook_double_hashes:n {#1} } \__hook_double_hashes:w }
+\exp_last_unbraced:NNo
+\cs_new:Npn \__hook_double_hashes_space:w \c_space_tl
+  { ~ \__hook_double_hashes:w }
 \cs_new_protected:Npn \__hook_retokenize_patch:Nnn #1 #2 #3
   {
     \__hook_patch_debug:x { ..~command~can~only~be~patched~by~rescanning }
@@ -5869,7 +5951,7 @@
           { \exp_not:N \__hook_tmp:w \token_to_meaning:N #1 \s__hook_mark }
       }
     \tl_rescan:nV { #4 \__hook_patch_required_catcodes: } \l__hook_tmpa_tl
-    \cs_set_eq:NN #1 \kerneltmpDoNotUse
+    \cs_gset_eq:NN #1 \kerneltmpDoNotUse
   }
 \msg_new:nnnn { hooks } { cant-patch }
   {
@@ -6208,8 +6290,8 @@ Type  H <return>  for immediate help.}%
 \def\@restorepar{\def\par{\@par}}
 %% File: ltpara.dtx (C) Copyright 2020-2021
 %%% From File: ltpara.dtx
-\def\ltparaversion{v1.0j}
-\def\ltparadate{2021/09/18}
+\def\ltparaversion{v1.0k}
+\def\ltparadate{2021/10/19}
 
 
 \ExplSyntaxOn
@@ -6709,6 +6791,7 @@ Type  H <return>  for immediate help.}%
 \expandafter\reserved@a
 \expandafter{\detokenize{.tex}}
 \def\@include#1 {%
+\ifx\@nodocument\relax
   \clearpage
   \if@filesw
     \immediate\write\@mainaux{\string\@input{#1.aux}}%
@@ -6744,7 +6827,12 @@ Type  H <return>  for immediate help.}%
     \deadcycles\z@
     \@nameuse{cp@#1}%
   \fi
-  \let\@auxout\@mainaux}
+  \let\@auxout\@mainaux
+\else
+\@latex@warning{%
+  \noexpand\include should only be used after \string\begin{document}}%
+\@input@{#1}%
+\fi}
 \NewHook{include/before}
 \NewReversedHook{include/end}
 \NewReversedHook{include/after}
@@ -6957,7 +7045,7 @@ Type  H <return>  for immediate help.}%
       \global\mathchardef\accent@spacefactor\spacefactor}%
    \let\maybe@load@fontshape\relax
    \let\ignorespaces\relax
-   \accent#1 #2\egroup\spacefactor\accent@spacefactor}
+   \accent#1 #2\egroup\ifmmode\else\spacefactor\accent@spacefactor\fi}
 \let\accent@spacefactor\relax
 \def\hmode@bgroup{\leavevmode\bgroup}
 \def\DeclareTextCompositeCommand#1#2#3#4{%
@@ -8822,11 +8910,22 @@ Type  H <return>  for immediate help.}%
     \endgroup
   \fi}%
 \@onlypreamble\dorestore@version
+\ifx\c@localmathalphabets\@undefined
+  \newcount\c@localmathalphabets
+  \setcounter{localmathalphabets}{2}
+\fi
 \def\document@select@group#1#2#3#4{%
  \ifx\math@bgroup\bgroup\else\relax\expandafter\@firstofone\fi
  {%
  \ifmmode
    \ifnum\csname c@mv@\math@version\endcsname<\e@mathgroup@top
+     \ifnum \numexpr\e@mathgroup@top-\c@localmathalphabets
+              >\csname c@mv@\math@version\endcsname
+     \else
+       \ifcsname mv@\math@version @frozen\endcsname \else
+         \expandafter\freeze@math@version\expandafter{\math@version}%
+       \fi
+     \fi
      \begingroup
        \escapechar\m@ne
        \getanddefine@fonts{\csname c@mv@\math@version\endcsname}#3%
@@ -8840,14 +8939,51 @@ Type  H <return>  for immediate help.}%
      \global\advance\csname c@mv@\math@version\endcsname\@ne
    \else
      \let#1\relax
-     \@latex@error{Too many math alphabets used
-                   in version \math@version}%
+     \@latex@error{Too many math alphabets used in
+                   version \math@version}%
         \@eha
   \fi
  \else \expandafter\expandafter\expandafter\non@alpherr\fi
  \expandafter#1\ifx\math@bgroup\bgroup{#4}\else#4\fi
  }%
 }
+\ExplSyntaxOn
+\cs_new_protected:Npn\freeze@math@version #1 {
+  \@font@info{Freeze~ math~ alphabet~ allocation~ in~ version~
+              #1.\MessageBreak
+              Allocated~math~groups:~\int_use:c{ c@mv@ #1 }~
+              (local:~  \int_use:N\c@localmathalphabets)      }
+  \cs_gset_eq:cc { mv@#1@frozen }{ mv@#1 }
+  \tl_gset:cx { g__nfss_frozen_mv_ #1 _tl }{ \int_use:c { c@mv@#1 } }
+  \group_insert_after:N \__nfss_init_mv_freeze:N \exp_after:wN
+    \group_insert_after:N \cs:w mv@#1@reset \cs_end:
+  \tl_gput_right:No \check@mathfonts
+       {
+         \exp_after:wN \group_insert_after:N \cs:w mv@#1@reset \cs_end:
+       }
+  \cs_gset:cpn{mv@#1@reset}
+     {
+         \int_compare:nNnTF { \int_use:c{c@mv@#1} } >
+                            { \tl_use:c{g__nfss_frozen_mv_ #1 _tl} }
+             {
+               \@font@info{Undo~ math~ alphabet~ allocation~ in~ version~ #1}
+               \cs_gset_eq:cc { mv@#1 }{ mv@#1@frozen }
+               \int_gset:cn { c@mv@#1 }{ \tl_use:c {g__nfss_frozen_mv_ #1 _tl} }
+               \group_begin:
+                 \cs_set_eq:NN \getanddefine@fonts \use_none:nn
+                 \use:c {mv@#1}
+               \group_end:
+             }
+             {
+               \@font@info{No~ math~ alphabet~ change~ to~ frozen~ version~ #1}
+             }
+    }
+}
+\cs_new_protected:Npn \__nfss_init_mv_freeze:N #1 {%
+  \mode_if_math:T { \group_insert_after:N \__nfss_init_mv_freeze:N
+                    \group_insert_after:N } #1
+}
+\ExplSyntaxOff
 \def\process@table{%
     \def\cdp@elt##1##2##3##4{%
         \@font@info{Checking defaults for
@@ -8893,6 +9029,7 @@ Type  H <return>  for immediate help.}%
 }
 \@onlypreamble\process@table
 \def\DeclareMathVersion#1{%
+  \@namedef{g__nfss_frozen_mv_#1_tl}{}%
   \expandafter\new@mathversion\csname mv@#1\endcsname}
 \@onlypreamble\DeclareMathVersion
 \def\new@mathversion#1{%
@@ -11230,6 +11367,7 @@ Type  H <return>  for immediate help.}%
 \def\eqnarray{%
    \stepcounter{equation}%
    \def\@currentlabel{\p@equation\theequation}%
+   \def\@currentcounter{equation}%
    \global\@eqnswtrue
    \m@th
    \global\@eqcnt\z@
@@ -11774,6 +11912,7 @@ Type  H <return>  for immediate help.}%
     \reset@font\footnotesize
     \hsize\columnwidth
     \@parboxrestore
+    \def\@currentcounter{mpfootnote}%
     \protected@edef\@currentlabel
          {\csname p@mpfootnote\endcsname\@thefnmark}%
     \color@begingroup
@@ -13076,6 +13215,7 @@ Type  H <return>  for immediate help.}%
     \splittopskip\footnotesep
     \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
     \hsize\columnwidth \@parboxrestore
+    \def\@currentcounter{footnote}%
     \protected@edef\@currentlabel{%
        \csname p@footnote\endcsname\@thefnmark
     }%
diff --git a/Master/texmf-dist/tex/latex-dev/base/latexrelease.sty b/Master/texmf-dist/tex/latex-dev/base/latexrelease.sty
index 0e580141cd2..96c73e3caa2 100644
--- a/Master/texmf-dist/tex/latex-dev/base/latexrelease.sty
+++ b/Master/texmf-dist/tex/latex-dev/base/latexrelease.sty
@@ -4441,8 +4441,8 @@ of this package available from CTAN}
 \catcode`\^^@=\@latexrelease@catcode@null\relax
 
 %%% From File: lthooks.dtx
-\def\lthooksversion{v1.0r}
-\def\lthooksdate{2021/09/06}
+\def\lthooksversion{v1.0s}
+\def\lthooksdate{2021/09/28}
 \ExplSyntaxOn
 \NewModuleRelease{2020/10/01}{lthooks}
                  {The~hook~management~system}
@@ -4844,7 +4844,7 @@ of this package available from CTAN}
   }
 \cs_new_protected:Npn \__hook_try_declaring_generic_hook:nNNnn #1
   {
-    \__hook_if_file_hook:wTF #1 / \s__hook_mark {#1}
+    \__hook_if_file_hook:wTF #1 / \s__hook_mark
       {
         \exp_args:Ne \__hook_try_declaring_generic_hook_split:nNNnn
           { \exp_args:Ne \__hook_file_hook_normalize:n {#1} }
@@ -5617,7 +5617,7 @@ of this package available from CTAN}
   }
 \cs_new_protected:Npn \__hook_try_file_hook:n #1
   {
-    \__hook_if_file_hook:wTF #1 / \s__hook_mark {#1}
+    \__hook_if_file_hook:wTF #1 / \s__hook_mark
       {
         \exp_args:Ne \__hook_if_usable_use:n
           { \exp_args:Ne \__hook_file_hook_normalize:n {#1} }
@@ -5997,16 +5997,21 @@ of this package available from CTAN}
 %% File: ltcmdhooks.dtx (C) Copyright 2020-2021
 %%       Frank Mittelbach, Phelype Oleinik, LaTeX Team
 %%% From File: ltcmdhooks.dtx
-\def\ltcmdhooksversion{v1.0d}
-\def\ltcmdhooksdate{2021/08/25}
+\def\ltcmdhooksversion{v1.0f}
+\def\ltcmdhooksdate{2021/10/20}
 \ExplSyntaxOn
 \NewModuleRelease{2021/06/01}{ltcmdhooks}
                  {The~hook~management~system~for~commands}
 \tl_new:N \g_hook_patch_action_list_tl
 \int_new:N \l__hook_patch_num_args_int
 \tl_new:N \l__hook_patch_prefixes_tl
-\tl_new:N \l__hook_patch_param_text_tl
-\tl_new:N \l__hook_patch_replacement_tl
+\tl_new:N \l__hook_param_text_tl
+\tl_new:N \l__hook_replace_text_tl
+\tl_const:Nn \c__hook_hash_tl { # # }
+\cs_new_eq:NN \__hook_exp_not:NN ?
+\cs_new_eq:NN \__hook_def_cmd:w ?
+\quark_new:N \q__hook_recursion_tail
+\quark_new:N \q__hook_recursion_stop
 \prop_new:N \g__hook_delayed_patches_prop
 \cs_new_protected:Npn \__hook_patch_debug:x #1
   { \__hook_debug:n { \iow_term:x { [lthooks]~#1 } } }
@@ -6154,19 +6159,40 @@ of this package available from CTAN}
       }
     \int_compare:nNnTF { \l__hook_patch_num_args_int } > { \c_zero_int }
       {
-        \tl_set:Nx \l__hook_patch_param_text_tl
-          { \bool_if:NTF #1 { [####1] } {  ####1  } }
-        \tl_set:Nx \l__hook_patch_replacement_tl
-          { \bool_if:NTF #1 { [####1] } { {####1} } }
+        \tl_set:Nx \l__hook_tmpa_tl { \bool_if:NTF #1 { [ ] } { { } } }
         \int_step_inline:nnn { 2 } { \l__hook_patch_num_args_int }
+          { \tl_put_right:Nn \l__hook_tmpa_tl { { } } }
+        \exp_args:NNo \exp_args:No \__hook_if_has_hash:nTF
+            { \exp_after:wN #2 \l__hook_tmpa_tl }
+          { \cs_set_eq:NN \__hook_exp_not:n \exp_not:n }
+          { \cs_set_eq:NN \__hook_exp_not:n \use:n }
+        \cs_set_protected:Npn \__hook_tmp:w ##1 ##2
           {
-            \tl_put_right:Nn \l__hook_patch_param_text_tl    { ## ####1 }
-            \tl_put_right:Nn \l__hook_patch_replacement_tl { { ## ####1 } }
+            ##1 \l__hook_param_text_tl   { \use:n ##2 }
+            ##1 \l__hook_replace_text_tl { \__hook_exp_not:n {##2} }
           }
+        \bool_if:NTF #1
+          { \__hook_tmp:w \tl_set:Nx { [ \c__hook_hash_tl 1 ] } }
+          { \__hook_tmp:w \tl_set:Nx { { \c__hook_hash_tl 1 } } }
+        \int_step_inline:nnn { 2 } { \l__hook_patch_num_args_int }
+          { \__hook_tmp:w \tl_put_right:Nx { { \c__hook_hash_tl ##1 } } }
+        \tl_set:Nx \l__hook_replace_text_tl
+          { \exp_not:N #2 \exp_not:V \l__hook_replace_text_tl }
+        \tl_set:Nx \l__hook_replace_text_tl
+          {
+            \token_if_eq_meaning:NNTF \__hook_exp_not:n \exp_not:n
+              { \exp_args:NNV \exp_args:No \__hook_double_hashes:n }
+              { \exp_args:NV \exp_not:o }
+                  \l__hook_replace_text_tl
+          }
+        \cs_set_eq:NN \__hook_def_cmd:w \tex_gdef:D
+        \cs_set_eq:NN \__hook_exp_not:NN \prg_do_nothing:
       }
       {
-        \tl_clear:N \l__hook_patch_param_text_tl
-        \tl_clear:N \l__hook_patch_replacement_tl
+        \tl_clear:N \l__hook_param_text_tl
+        \tl_set_eq:NN \l__hook_replace_text_tl #2
+        \cs_set_eq:NN \__hook_def_cmd:w \tex_xdef:D
+        \cs_set:Npn \__hook_exp_not:NN ##1 { \exp_not:N ##1 \exp_not:N }
       }
     \group_begin:
       \int_set:Nn \tex_escapechar:D { `\/ }
@@ -6178,18 +6204,22 @@ of this package available from CTAN}
         }
     \use:x
       {
-        \l__hook_patch_prefixes_tl \tex_def:D
-            \exp_not:N #2 \exp_not:V \l__hook_patch_param_text_tl
-          {
-            \str_if_eq:nnT {#4} { before }
-              { \exp_not:N \UseHook { cmd / #3 / #4 } }
-            \exp_args:No \exp_not:o
-              { \exp_after:wN #2 \l__hook_patch_replacement_tl }
-            \str_if_eq:nnT {#4} { after }
-              { \exp_not:N \UseHook { cmd / #3 / #4 } }
-          }
+        \__hook_redefine_with_hooks:Nnnn \exp_not:N #2
+        \str_if_eq:nnTF {#4} { after }
+          { \use_ii_i:nn }
+          { \use:nn }
+            { { \__hook_exp_not:NN \exp_not:N \UseHook { cmd / #3 / #4 } } }
+            { { } }
+            { \__hook_exp_not:NN \exp_not:V \l__hook_replace_text_tl }
       }
   }
+\cs_new_protected:Npn \__hook_redefine_with_hooks:Nnnn #1 #2 #3 #4
+  {
+    \l__hook_patch_prefixes_tl
+      \exp_after:wN \__hook_def_cmd:w
+        \exp_after:wN #1 \l__hook_param_text_tl
+      { #2  #4  #3 }
+  }
 \cs_new:Npn \__hook_make_prefixes:w / #1 /
   {
     \tl_if_empty:nF {#1}
@@ -6198,6 +6228,58 @@ of this package available from CTAN}
         \__hook_make_prefixes:w /
       }
   }
+\prg_new_conditional:Npnn \__hook_if_has_hash:n #1 { TF }
+  { \__hook_if_has_hash:w #1 ## \s__hook_mark }
+\cs_new:Npn \__hook_if_has_hash:w #1
+  {
+    \tl_if_single_token:nTF {#1}
+      {
+        \token_if_eq_catcode:NNTF ## #1
+          { \__hook_if_has_hash_check:w }
+          { \__hook_if_has_hash:w }
+      }
+      { \__hook_if_has_hash:w #1 }
+  }
+\cs_new:Npn \__hook_if_has_hash_check:w #1 \s__hook_mark
+  { \tl_if_empty:nTF {#1} { \prg_return_false: } { \prg_return_true: } }
+\cs_new:Npn \__hook_double_hashes:n #1
+  { \__hook_double_hashes:w #1 \q__hook_recursion_tail \q__hook_recursion_stop }
+\cs_new:Npn \__hook_double_hashes:w #1 \q__hook_recursion_stop
+  {
+    \tl_if_head_is_N_type:nTF {#1}
+      { \__hook_double_hashes_output:N }
+      {
+        \tl_if_head_is_group:nTF {#1}
+          { \__hook_double_hashes_group:n }
+          { \__hook_double_hashes_space:w }
+      }
+    #1 \q__hook_recursion_stop
+  }
+\cs_new:Npn \__hook_double_hashes_output:N #1
+  {
+    \if_meaning:w \q__hook_recursion_tail #1
+      \__hook_double_hashes_stop:w
+    \fi:
+    \if_meaning:w \c__hook_hash_tl #1
+      \use_i:nnnn
+    \fi:
+    \use:n
+      {
+        \if_catcode:w ## \exp_not:N #1
+          \exp_after:wN \use_ii:nnnn
+        \fi:
+        \use_none:n
+          { \exp_not:n { #1 #1 } }
+      }
+    \exp_not:N #1
+    \__hook_double_hashes:w
+  }
+\cs_new:Npn \__hook_double_hashes_stop:w #1 \q__hook_recursion_stop { \fi: }
+\cs_new:Npn \__hook_double_hashes_group:n #1
+  { { \__hook_double_hashes:n {#1} } \__hook_double_hashes:w }
+\exp_last_unbraced:NNo
+\cs_new:Npn \__hook_double_hashes_space:w \c_space_tl
+  { ~ \__hook_double_hashes:w }
 \cs_new_protected:Npn \__hook_retokenize_patch:Nnn #1 #2 #3
   {
     \__hook_patch_debug:x { ..~command~can~only~be~patched~by~rescanning }
@@ -6298,7 +6380,7 @@ of this package available from CTAN}
           { \exp_not:N \__hook_tmp:w \token_to_meaning:N #1 \s__hook_mark }
       }
     \tl_rescan:nV { #4 \__hook_patch_required_catcodes: } \l__hook_tmpa_tl
-    \cs_set_eq:NN #1 \kerneltmpDoNotUse
+    \cs_gset_eq:NN #1 \kerneltmpDoNotUse
   }
 \IncludeInRelease{2021/11/15}{wrong-cmd-hook}%
                  {Standardise~generic~hook~names}
@@ -6387,8 +6469,8 @@ of this package available from CTAN}
 %%% From File: ltpar.dtx
 %% File: ltpara.dtx (C) Copyright 2020-2021
 %%% From File: ltpara.dtx
-\def\ltparaversion{v1.0j}
-\def\ltparadate{2021/09/18}
+\def\ltparaversion{v1.0k}
+\def\ltparadate{2021/10/19}
 
 
 \ExplSyntaxOn
@@ -6526,6 +6608,9 @@ of this package available from CTAN}
 \cs_set_eq:NN \@@par   \tex_par:D
 \cs_set_eq:NN \endgraf \tex_par:D
 
+\tex_everypar:D {}
+\cs_set_eq:NN \everypar \tex_everypar:D
+
 \EndModuleRelease
 \ExplSyntaxOff
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -7118,6 +7203,7 @@ of this package available from CTAN}
 \IncludeInRelease{2020/10/01}%
                  {\@include}{Spaces in file names and hooks}%
 \def\@include#1 {%
+\ifx\@nodocument\relax
   \clearpage
   \if@filesw
     \immediate\write\@mainaux{\string\@input{#1.aux}}%
@@ -7153,7 +7239,12 @@ of this package available from CTAN}
     \deadcycles\z@
     \@nameuse{cp@#1}%
   \fi
-  \let\@auxout\@mainaux}
+  \let\@auxout\@mainaux
+\else
+\@latex@warning{%
+  \noexpand\include should only be used after \string\begin{document}}%
+\@input@{#1}%
+\fi}
 \NewHook{include/before}
 \NewReversedHook{include/end}
 \NewReversedHook{include/after}
@@ -8839,8 +8930,86 @@ of this package available from CTAN}
  }%
 }
 \EndIncludeInRelease
+\IncludeInRelease{2021/11/15}
+  {\document@select@group}{\document@select@group}%
+\ifx\c@localmathalphabets\@undefined
+  \newcount\c@localmathalphabets
+  \setcounter{localmathalphabets}{2}
+\fi
+\def\document@select@group#1#2#3#4{%
+ \ifx\math@bgroup\bgroup\else\relax\expandafter\@firstofone\fi
+ {%
+ \ifmmode
+   \ifnum\csname c@mv@\math@version\endcsname<\e@mathgroup@top
+     \ifnum \numexpr\e@mathgroup@top-\c@localmathalphabets
+              >\csname c@mv@\math@version\endcsname
+     \else
+       \ifcsname mv@\math@version @frozen\endcsname \else
+         \expandafter\freeze@math@version\expandafter{\math@version}%
+       \fi
+     \fi
+     \begingroup
+       \escapechar\m@ne
+       \getanddefine@fonts{\csname c@mv@\math@version\endcsname}#3%
+       \globaldefs\@ne  \math@fonts
+     \endgroup
+     \expandafter\extract@alph@from@version
+         \csname mv@\math@version\expandafter\endcsname
+         \expandafter{\number\csname
+                       c@mv@\math@version\endcsname}%
+          #1%
+     \global\advance\csname c@mv@\math@version\endcsname\@ne
+   \else
+     \let#1\relax
+     \@latex@error{Too many math alphabets used in
+                   version \math@version}%
+        \@eha
+  \fi
+ \else \expandafter\expandafter\expandafter\non@alpherr\fi
+ \expandafter#1\ifx\math@bgroup\bgroup{#4}\else#4\fi
+ }%
+}
+\ExplSyntaxOn
+\cs_new_protected:Npn\freeze@math@version #1 {
+  \@font@info{Freeze~ math~ alphabet~ allocation~ in~ version~
+              #1.\MessageBreak
+              Allocated~math~groups:~\int_use:c{ c@mv@ #1 }~
+              (local:~  \int_use:N\c@localmathalphabets)      }
+  \cs_gset_eq:cc { mv@#1@frozen }{ mv@#1 }
+  \tl_gset:cx { g__nfss_frozen_mv_ #1 _tl }{ \int_use:c { c@mv@#1 } }
+  \group_insert_after:N \__nfss_init_mv_freeze:N \exp_after:wN
+    \group_insert_after:N \cs:w mv@#1@reset \cs_end:
+  \tl_gput_right:No \check@mathfonts
+       {
+         \exp_after:wN \group_insert_after:N \cs:w mv@#1@reset \cs_end:
+       }
+  \cs_gset:cpn{mv@#1@reset}
+     {
+         \int_compare:nNnTF { \int_use:c{c@mv@#1} } >
+                            { \tl_use:c{g__nfss_frozen_mv_ #1 _tl} }
+             {
+               \@font@info{Undo~ math~ alphabet~ allocation~ in~ version~ #1}
+               \cs_gset_eq:cc { mv@#1 }{ mv@#1@frozen }
+               \int_gset:cn { c@mv@#1 }{ \tl_use:c {g__nfss_frozen_mv_ #1 _tl} }
+               \group_begin:
+                 \cs_set_eq:NN \getanddefine@fonts \use_none:nn
+                 \use:c {mv@#1}
+               \group_end:
+             }
+             {
+               \@font@info{No~ math~ alphabet~ change~ to~ frozen~ version~ #1}
+             }
+    }
+}
+\cs_new_protected:Npn \__nfss_init_mv_freeze:N #1 {%
+  \mode_if_math:T { \group_insert_after:N \__nfss_init_mv_freeze:N
+                    \group_insert_after:N } #1
+}
+\ExplSyntaxOff
+\EndIncludeInRelease
 \IncludeInRelease{2020/10/01}
   {\document@select@group}{\document@select@group}%
+
 \def\document@select@group#1#2#3#4{%
  \ifx\math@bgroup\bgroup\else\relax\expandafter\@firstofone\fi
  {%
@@ -8930,6 +9099,18 @@ of this package available from CTAN}
  }%
 }
 \EndIncludeInRelease
+\IncludeInRelease{2021/11/15}%
+                 {\DeclareMathVersion}{local alphabets}%
+\def\DeclareMathVersion#1{%
+  \@namedef{g__nfss_frozen_mv_#1_tl}{}%
+  \expandafter\new@mathversion\csname mv@#1\endcsname}
+\@onlypreamble\DeclareMathVersion
+\EndIncludeInRelease
+\IncludeInRelease{0000/00/00}%
+                 {\DeclareMathVersion}{local alphabets}%
+\def\DeclareMathVersion#1{%
+  \expandafter\new@mathversion\csname mv@#1\endcsname}
+\EndIncludeInRelease
 \IncludeInRelease{2019/10/01}%
                  {DeclareMathAccent}{Make math accents robust}%
 \def\DeclareMathAccent#1#2#3#4{%
@@ -11372,6 +11553,23 @@ of this package available from CTAN}
   \baselineskip\normalbaselineskip
   \sloppy}
 \EndIncludeInRelease
+\IncludeInRelease{2021/11/15}%
+                 {\@mpfootnotetext}{footnotetext tagging}%
+\long\def\@mpfootnotetext#1{%
+  \global\setbox\@mpfootins\vbox{%
+    \unvbox\@mpfootins
+    \reset@font\footnotesize
+    \hsize\columnwidth
+    \@parboxrestore
+    \def\@currentcounter{mpfootnote}%
+    \protected@edef\@currentlabel
+         {\csname p@mpfootnote\endcsname\@thefnmark}%
+    \color@begingroup
+      \@makefntext{%
+        \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}%
+    \par
+    \color@endgroup}}
+\EndIncludeInRelease
 \IncludeInRelease{2021/06/01}%
                  {\@mpfootnotetext}{footnotetext tagging}%
 \long\def\@mpfootnotetext#1{%
@@ -12427,6 +12625,24 @@ of this package available from CTAN}
                  {\@textsubscript}{subscript baseline}%
 \let\@textsubscript\@undefined
 \EndIncludeInRelease
+\IncludeInRelease{2021/11/15}%
+                 {\@footnotetext}{footnotetext tagging}%
+\long\def\@footnotetext#1{\insert\footins{%
+    \reset@font\footnotesize
+    \interlinepenalty\interfootnotelinepenalty
+    \splittopskip\footnotesep
+    \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
+    \hsize\columnwidth \@parboxrestore
+    \def\@currentcounter{footnote}%
+    \protected@edef\@currentlabel{%
+       \csname p@footnote\endcsname\@thefnmark
+    }%
+    \color@begingroup
+      \@makefntext{%
+        \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}%
+    \par
+    \color@endgroup}}%
+\EndIncludeInRelease
 \IncludeInRelease{2021/06/01}%
                  {\@footnotetext}{footnotetext tagging}%
 \long\def\@footnotetext#1{\insert\footins{%
diff --git a/Master/texmf-dist/tex/latex-dev/base/ltluatex.lua b/Master/texmf-dist/tex/latex-dev/base/ltluatex.lua
index 118a36a2745..5f14651fbff 100644
--- a/Master/texmf-dist/tex/latex-dev/base/ltluatex.lua
+++ b/Master/texmf-dist/tex/latex-dev/base/ltluatex.lua
@@ -326,6 +326,7 @@ local callbacktypes = callbacktypes or {
   make_extensible                 = exclusive,
   font_descriptor_objnum_provider = exclusive,
   input_level_string              = exclusive,
+  provide_charproc_data           = exclusive,
 }
 luatexbase.callbacktypes=callbacktypes
 local callback_register = callback_register or callback.register
diff --git a/Master/texmf-dist/tex/latex-dev/base/ltluatex.tex b/Master/texmf-dist/tex/latex-dev/base/ltluatex.tex
index 75e2d234aa4..9cf7c9511a6 100644
--- a/Master/texmf-dist/tex/latex-dev/base/ltluatex.tex
+++ b/Master/texmf-dist/tex/latex-dev/base/ltluatex.tex
@@ -47,7 +47,7 @@
   #1#2[#3]{\endgroup\immediate\write-1{File: #1 #3}}
 \fi
 \ProvidesFile{ltluatex.tex}%
-[2021/08/11 v1.1u
+[2021/10/15 v1.1v
   LuaTeX support for plain TeX (core)
 ]
 \edef\etatcatcode{\the\catcode`\@}
diff --git a/Master/texmf-dist/tex/latex-dev/base/makeidx.sty b/Master/texmf-dist/tex/latex-dev/base/makeidx.sty
index 518507399a7..69ee592cf71 100644
--- a/Master/texmf-dist/tex/latex-dev/base/makeidx.sty
+++ b/Master/texmf-dist/tex/latex-dev/base/makeidx.sty
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesPackage{makeidx}
-                [2014/09/29 v1.0m Standard LaTeX package]
+                [2021/10/04 v1.0m Standard LaTeX package]
 \newcommand*\see[2]{\emph{\seename} #1}
 \providecommand*\seealso[2]{\emph{\alsoname} #1}
 \newcommand\printindex{\@input@{\jobname.ind}}
diff --git a/Master/texmf-dist/tex/latex-dev/base/preload.ltx b/Master/texmf-dist/tex/latex-dev/base/preload.ltx
index 14b6aa4caa1..9e88f31d02c 100644
--- a/Master/texmf-dist/tex/latex-dev/base/preload.ltx
+++ b/Master/texmf-dist/tex/latex-dev/base/preload.ltx
@@ -37,7 +37,7 @@
 %% 
 %%% From File: preload.dtx
  \ProvidesFile{preload.ltx}
-         [2014/09/29 v2.1g LaTeX Kernel (Font Preloading)]
+         [2021/10/04 v2.1g LaTeX Kernel (Font Preloading)]
 \expandafter\font\csname OMX/cmex/m/n/10\endcsname=cmex10\relax
 \font\tenln  =line10   \font\tenlnw  =linew10\relax
 \font\tencirc=lcircle10 \font\tencircw=lcirclew10\relax
diff --git a/Master/texmf-dist/tex/latex-dev/base/report.cls b/Master/texmf-dist/tex/latex-dev/base/report.cls
index 3c6221ed6a1..c8a4255d4a2 100644
--- a/Master/texmf-dist/tex/latex-dev/base/report.cls
+++ b/Master/texmf-dist/tex/latex-dev/base/report.cls
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1995/12/01]
 \ProvidesClass{report}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
  Standard LaTeX document class]
 \newcommand\@ptsize{}
 \newif\if@restonecol
diff --git a/Master/texmf-dist/tex/latex-dev/base/shortvrb.sty b/Master/texmf-dist/tex/latex-dev/base/shortvrb.sty
index 1aa89066c06..2f2df48380e 100644
--- a/Master/texmf-dist/tex/latex-dev/base/shortvrb.sty
+++ b/Master/texmf-dist/tex/latex-dev/base/shortvrb.sty
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1994/12/01]
 \ProvidesPackage{shortvrb}
-  [2021/05/28 v2.1n
+  [2021/10/04 v2.1n
    Standard LaTeX documentation package (FMi)]
 %%
 %% Package `doc' to use with LaTeX 2e
diff --git a/Master/texmf-dist/tex/latex-dev/base/showidx.sty b/Master/texmf-dist/tex/latex-dev/base/showidx.sty
index d0a2967d8f6..deec7bb819e 100644
--- a/Master/texmf-dist/tex/latex-dev/base/showidx.sty
+++ b/Master/texmf-dist/tex/latex-dev/base/showidx.sty
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesPackage{showidx}
-                [2014/09/29 v1.0m Standard LaTeX package]
+                [2021/10/04 v1.0m Standard LaTeX package]
 \newinsert\indexbox
 \dimen\indexbox=\maxdimen
 \renewcommand\index{\@bsphack\begingroup
diff --git a/Master/texmf-dist/tex/latex-dev/base/size10.clo b/Master/texmf-dist/tex/latex-dev/base/size10.clo
index ba08cc0a1da..44d49d79b50 100644
--- a/Master/texmf-dist/tex/latex-dev/base/size10.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/size10.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{size10.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xpt\@xiipt
diff --git a/Master/texmf-dist/tex/latex-dev/base/size11.clo b/Master/texmf-dist/tex/latex-dev/base/size11.clo
index 31b05c0c872..aa52bb6a06a 100644
--- a/Master/texmf-dist/tex/latex-dev/base/size11.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/size11.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{size11.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xipt{13.6}%
diff --git a/Master/texmf-dist/tex/latex-dev/base/size12.clo b/Master/texmf-dist/tex/latex-dev/base/size12.clo
index bc7051ed988..2ca0d7405ae 100644
--- a/Master/texmf-dist/tex/latex-dev/base/size12.clo
+++ b/Master/texmf-dist/tex/latex-dev/base/size12.clo
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{size12.clo}
-              [2021/09/11 v1.4n
+              [2021/10/04 v1.4n
       Standard LaTeX file (size option)]
 \renewcommand\normalsize{%
    \@setfontsize\normalsize\@xiipt{14.5}%
diff --git a/Master/texmf-dist/tex/latex-dev/base/slides.cls b/Master/texmf-dist/tex/latex-dev/base/slides.cls
index ffbdbdbff8f..8dc33962200 100644
--- a/Master/texmf-dist/tex/latex-dev/base/slides.cls
+++ b/Master/texmf-dist/tex/latex-dev/base/slides.cls
@@ -43,7 +43,7 @@
 %% extension .ins) which are part of the distribution.
 \NeedsTeXFormat{LaTeX2e}[1997/06/01]
 \ProvidesClass{slides}
-              [2020/11/23 v2.4b
+              [2021/10/04 v2.4b
                Standard LaTeX document class]
 \input{slides.def}
 \InputIfFileExists{sfonts.cfg}
diff --git a/Master/texmf-dist/tex/latex-dev/base/slides.def b/Master/texmf-dist/tex/latex-dev/base/slides.def
index f23e9313989..d1dcc58b84a 100644
--- a/Master/texmf-dist/tex/latex-dev/base/slides.def
+++ b/Master/texmf-dist/tex/latex-dev/base/slides.def
@@ -42,7 +42,7 @@
 %% and covered by LPPL is defined by the unpacking scripts (with
 %% extension .ins) which are part of the distribution.
 \ProvidesFile{slides.def}
-              [2020/11/23 v2.4b
+              [2021/10/04 v2.4b
                SLiTeX definitions]
 \message{hacks,}
 
diff --git a/Master/texmf-dist/tex/latex-dev/base/source2edoc.cls b/Master/texmf-dist/tex/latex-dev/base/source2edoc.cls
index ba6acf9f80e..bef81d995d4 100644
--- a/Master/texmf-dist/tex/latex-dev/base/source2edoc.cls
+++ b/Master/texmf-dist/tex/latex-dev/base/source2edoc.cls
@@ -61,6 +61,24 @@
     \int_compare:nNnTF \@auxout = \@partaux
       { \@latexerr{\string\include\space cannot~be~nested}\@eha }
       { \@docinclude {#1} }  % <--- braces needed!
+    \int_compare:nNnF { \tex_currentgrouplevel:D } = { 0 }
+      {
+        \int_compare:nNnT { \tex_interactionmode:D } = { 0 }
+          { \int_set:Nn \tex_interactionmode:D { 1 } }
+        \msg_fatal:nnn { source2edoc } { missing-endgroup } {#1}
+      }
+  }
+\msg_new:nnn { source2edoc } { missing-endgroup }
+  {
+    \str_if_eq:VnTF \@currenvir { document }
+      {
+        There~are~\int_use:N \tex_currentgrouplevel:D
+        \c_space_tl unclosed~groups~in~#1.dtx.
+      }
+      {
+        The~\@currenvir \c_space_tl environment~on~line~\@currenvline
+        \c_space_tl doesn't~have~a~matching~\iow_char:N\\end{\@currenvir}.
+      }
   }
 \cs_gset:Npn \@docinclude #1
   {