l3kernel (13jan19)

git-svn-id: svn://tug.org/texlive/trunk@49692 c570f23f-e606-0410-a88d-b1316a301751

51 files changed, 214 insertions, 180 deletions

diff --git a/Master/texmf-dist/source/latex/l3kernel/expl3.dtx b/Master/texmf-dist/source/latex/l3kernel/expl3.dtx
index 010acc2ef42..615f179bb16 100644
--- a/Master/texmf-dist/source/latex/l3kernel/expl3.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/expl3.dtx
@@ -21,7 +21,7 @@
 % for those people who are interested.
 %
 %<*driver|generic|package>
-\def\ExplFileDate{2019-01-01}%
+\def\ExplFileDate{2019-01-12}%
 %</driver|generic|package>
 %<*driver>
 \documentclass[full]{l3doc}
@@ -49,7 +49,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3alloc.dtx b/Master/texmf-dist/source/latex/l3kernel/l3alloc.dtx
index 46d67b00d5e..94e523ea661 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3alloc.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3alloc.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3basics.dtx b/Master/texmf-dist/source/latex/l3kernel/l3basics.dtx
index 44e0968f05b..03bd6180794 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3basics.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3basics.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3bootstrap.dtx b/Master/texmf-dist/source/latex/l3kernel/l3bootstrap.dtx
index 5b6c4aa23eb..2ce2f3b2e11 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3bootstrap.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3bootstrap.dtx
@@ -138,7 +138,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3box.dtx b/Master/texmf-dist/source/latex/l3kernel/l3box.dtx
index 39a4ab8c754..ef4a9b2d763 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3box.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3box.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -583,7 +583,7 @@
 %     \vbox_gset_to_ht:Nnw, \vbox_gset_to_ht:cnw
 %   }
 %   \begin{syntax}
-%     \cs{vbox_set_to_wd:Nnw} \meta{box} \Arg{dimexpr} \meta{contents} \cs{vbox_set_end:}
+%     \cs{vbox_set_to_ht:Nnw} \meta{box} \Arg{dimexpr} \meta{contents} \cs{vbox_set_end:}
 %   \end{syntax}
 %   Typesets the \meta{contents} to the height given by the \meta{dimexpr}
 %   and then stores the result inside the \meta{box}. In contrast
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3candidates.dtx b/Master/texmf-dist/source/latex/l3kernel/l3candidates.dtx
index 780b8ac6b03..c23a8825320 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3candidates.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3candidates.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -353,9 +353,7 @@
 %   path and the additional paths controlled by \cs{file_path_include:n}.
 %   If found, sets the \meta{str var} to the size of the file in bytes.
 %   Where the file is not found, the \meta{str var} will be empty.
-%   \begin{texnote}
-%     Currently this is not available with \XeTeX{}.
-%   \end{texnote}
+%   This is not available in older versions of \XeTeX{}.
 % \end{function}
 %
 % \begin{function}[added = 2017-07-09]{\file_get_timestamp:nN}
@@ -369,9 +367,7 @@
 %   \meta{minute}\meta{second}\meta{offset}, where the latter may be |Z|
 %   (UTC) or \meta{plus-minus}\meta{hours}|'|\meta{minutes}|'|.
 %   Where the file is not found, the \meta{str var} will be empty.
-%   \begin{texnote}
-%     Currently this is not available with \XeTeX{}.
-%   \end{texnote}
+%   This is not available in older versions of \XeTeX{}.
 % \end{function}
 %
 % \begin{function}[added = 2014-07-02]{\file_if_exist_input:n, \file_if_exist_input:nF}
@@ -451,8 +447,9 @@
 %   $2^{30}-1$, an error occurs.  Entries are generated in the same way
 %   as repeated calls to \cs{int_rand:nn} or \cs{int_rand:n}
 %   respectively, in particular for the second function the
-%   \meta{minimum} is $1$.  This is not yet available in \XeTeX{}.
+%   \meta{minimum} is $1$.
 %   Assignments are always global.
+%   This is not available in older versions of \XeTeX{}.
 % \end{function}
 %
 % \subsection{Working with contents of integer arrays}
@@ -632,7 +629,8 @@
 %   \end{syntax}
 %   Selects a pseudo-random key--value pair from the \meta{property list}
 %   and returns \Arg{key} and \Arg{value}.  If the \meta{property list} is
-%   empty the result is empty.  This is not yet available in \XeTeX{}.
+%   empty the result is empty.
+%   This is not available in older versions of \XeTeX{}.
 %   \begin{texnote}
 %     The result is returned within the \tn{unexpanded}
 %     primitive (\cs{exp_not:n}), which means that the \meta{value}
@@ -4443,34 +4441,39 @@
           \exp_after:wN \@@_tmp:w \l_@@_internal_a_tl
           \@@_loop:nn
         }
-      \cs_set_protected:Npn \@@_tmp:w #1#2#3#4#5#6#7#8
+      \cs_set_protected:Npn \@@_tmp:nnnn #1#2#3#4#5
         {
           \tl_const:cx
             {
-              c_@@_lower_case_
-              \char_generate:nn {#1} { 12 }
+              c_@@_ #1 _case_
               \char_generate:nn {#2} { 12 }
+              \char_generate:nn {#3} { 12 }
               _tl
             }
             {
               \exp_after:wN \exp_after:wN \exp_after:wN
-                \exp_not:N \char_generate:nn {#5} { 13 }
+                \exp_not:N \char_generate:nn {#4} { 13 }
               \exp_after:wN \exp_after:wN \exp_after:wN
-                \exp_not:N \char_generate:nn {#6} { 13 }
+                \exp_not:N \char_generate:nn {#5} { 13 }
             }
+        }
+      \cs_set_protected:Npn \@@_tmp:w #1#2#3#4#5#6#7#8
+        {
           \tl_const:cx
             {
-              c_@@_upper_case_
-              \char_generate:nn {#5} { 12 }
-              \char_generate:nn {#6} { 12 }
+              c_@@_lower_case_
+              \char_generate:nn {#1} { 12 }
+              \char_generate:nn {#2} { 12 }
               _tl
             }
             {
               \exp_after:wN \exp_after:wN \exp_after:wN
-                \exp_not:N \char_generate:nn {#1} { 13 }
+                \exp_not:N \char_generate:nn {#5} { 13 }
               \exp_after:wN \exp_after:wN \exp_after:wN
-                \exp_not:N \char_generate:nn {#2} { 13 }
+                \exp_not:N \char_generate:nn {#6} { 13 }
             }
+          \@@_tmp:nnnn { upper } {#5} {#6} {#1} {#2}
+          \@@_tmp:nnnn { mixed } {#5} {#6} {#1} {#2}
         }
       \@@_loop:nn
         { 00C0 } { 00E0 }
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3clist.dtx b/Master/texmf-dist/source/latex/l3kernel/l3clist.dtx
index 3ed242d1809..2972346e50b 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3clist.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3clist.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3coffins.dtx b/Master/texmf-dist/source/latex/l3kernel/l3coffins.dtx
index 2f9429c6d12..59cf147c27b 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3coffins.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3coffins.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3coffins.dtx Copyright(C) 2010-2019 The LaTeX3 Project
+%% File: l3coffins.dtx Copyright (C) 2010-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3color-base.dtx b/Master/texmf-dist/source/latex/l3kernel/l3color-base.dtx
index aa5b6a1d2ec..1946a9a269e 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3color-base.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3color-base.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3color-base.dtx Copyright(C) 2011,2012,2014,2016-2019 The LaTeX3 Project
+%% File: l3color-base.dtx Copyright (C) 2011,2012,2014,2016-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3deprecation.dtx b/Master/texmf-dist/source/latex/l3kernel/l3deprecation.dtx
index 37860cf2cb3..5015598e4d6 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3deprecation.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3deprecation.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3doc.dtx b/Master/texmf-dist/source/latex/l3kernel/l3doc.dtx
index 43a05058002..01bc02e5e31 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3doc.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3doc.dtx
@@ -29,7 +29,7 @@
 \askforoverwritefalse
 \preamble
 
-Copyright (C) 1990-2017 The LaTeX3 Project
+Copyright (C) 1990-2017,2019 The LaTeX3 Project
 
 It may be distributed and/or modified under the conditions of
 the LaTeX Project Public License (LPPL), either version 1.3c of
@@ -77,7 +77,7 @@ and all files in that bundle must be distributed together.
 %
 % \title{The \cls{l3doc} class}
 % \author{\Team}
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 % \maketitle
 % \tableofcontents
 %
@@ -1351,6 +1351,8 @@ and all files in that bundle must be distributed together.
   { The~deprecated~function(s)~'#1'~should~have~been~removed~on~#2. }
 \msg_new:nnn { l3doc } { date-format }
   { The~date~'#1'~should~be~given~in~YYYY-MM-DD~format. }
+\msg_new:nnn { l3doc } { future-date }
+  { The~added/updated~date~'#2'~of~'#1'~is~in~the~future. }
 \msg_new:nnn { l3doc } { syntax-nested-function }
   {
     The~'syntax'~environment~should~be~used~in~the~
@@ -2370,8 +2372,8 @@ and all files in that bundle must be distributed together.
         \bool_set_true:N \l_@@_macro_noTF_bool
         \bool_set_true:N \l_@@_macro_TF_bool
       } ,
-    added .code:n = { \@@_date_set:Nn \l_@@_date_added_tl {#1} },
-    updated .code:n = { \@@_date_set:Nn \l_@@_date_updated_tl {#1} } ,
+    added .code:n = { \@@_date_set_past:Nn \l_@@_date_added_tl {#1} },
+    updated .code:n = { \@@_date_set_past:Nn \l_@@_date_updated_tl {#1} } ,
     deprecated .code:n = { \@@_deprecated_on:n {#1} } ,
     tested .code:n = { } ,
     label .code:n =
@@ -2385,9 +2387,11 @@ and all files in that bundle must be distributed together.
   }
 %    \end{macrocode}
 %
-% \begin{macro}{\@@_date_set:Nn}
+% \begin{macro}{\@@_date_set:Nn,\@@_date_set_past:Nn}
 %   Normalize the date into the format \texttt{YYYY-MM-DD}; more
-%   precisely month and day are allowed to be single digits.
+%   precisely month and day are allowed to be single digits.  The
+%   \cs{@@_date_set_past:Nn} function only allows dates in the past (or
+%   same day).
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_date_set:Nn #1#2
   {
@@ -2399,6 +2403,17 @@ and all files in that bundle must be distributed together.
         \tl_set:Nn #1 { 1970-01-01 }
       }
   }
+\cs_new_protected:Npn \@@_date_set_past:Nn #1#2
+  {
+    \@@_date_set:Nn #1 {#2}
+    \exp_args:No \@@_date_compare:nNnT
+      {#1} > { \tex_year:D - \tex_month:D - \tex_day:D }
+      {
+        \msg_error:nnxx { l3doc } { future-date }
+          { \tl_to_str:N \l_@@_macro_argument_tl }
+          {#1}
+      }
+  }
 %    \end{macrocode}
 % \end{macro}
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3docstrip.dtx b/Master/texmf-dist/source/latex/l3kernel/l3docstrip.dtx
index 96633a2f925..175b865f832 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3docstrip.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3docstrip.dtx
@@ -61,7 +61,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx b/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
index 340af23602f..4028ef36d1c 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3drivers.dtx Copyright(C) 2011-2019 The LaTeX3 Project
+%% File: l3drivers.dtx Copyright (C) 2011-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -554,23 +554,23 @@
 %<*package>
 \ProvidesExplFile
 %<*dvipdfmx>
-  {l3dvidpfmx.def}{2019-01-01}{}
+  {l3dvidpfmx.def}{2019-01-12}{}
   {L3 Experimental driver: dvipdfmx}
 %</dvipdfmx>
 %<*dvips>
-  {l3dvips.def}{2019-01-01}{}
+  {l3dvips.def}{2019-01-12}{}
   {L3 Experimental driver: dvips}
 %</dvips>
 %<*dvisvgm>
-  {l3dvisvgm.def}{2019-01-01}{}
+  {l3dvisvgm.def}{2019-01-12}{}
   {L3 Experimental driver: dvisvgm}
 %</dvisvgm>
 %<*pdfmode>
-  {l3pdfmode.def}{2019-01-01}{}
+  {l3pdfmode.def}{2019-01-12}{}
   {L3 Experimental driver: PDF mode}
 %</pdfmode>
 %<*xdvipdfmx>
-  {l3xdvidpfmx.def}{2019-01-01}{}
+  {l3xdvidpfmx.def}{2019-01-12}{}
   {L3 Experimental driver: xdvipdfmx}
 %</xdvipdfmx>
 %</package>
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3expan.dtx b/Master/texmf-dist/source/latex/l3kernel/l3expan.dtx
index 7d5d2bf5d22..e6794c011d3 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3expan.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3expan.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3file.dtx b/Master/texmf-dist/source/latex/l3kernel/l3file.dtx
index 1b1248f2484..c6edd31bf4e 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3file.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3file.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -1002,11 +1002,11 @@
 \cs_new_protected:Npn \@@_map_inline_loop:NNN #1#2#3
   {
     #2 #3 \l_@@_internal_tl
-    \ior_if_eof:NF #3
-      {
-        \exp_args:No #1 \l_@@_internal_tl
-        \@@_map_inline_loop:NNN #1#2#3
-      }
+    \if_eof:w #3
+      \exp_after:wN \use_none:nnnnnnn
+    \fi:
+      \exp_args:No #1 \l_@@_internal_tl
+      \@@_map_inline_loop:NNN #1#2#3
   }
 %    \end{macrocode}
 % \end{macro}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3final.dtx b/Master/texmf-dist/source/latex/l3kernel/l3final.dtx
index 36809a81885..3909edc9159 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3final.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3final.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3flag.dtx b/Master/texmf-dist/source/latex/l3kernel/l3flag.dtx
index 2a5e284ecd8..f8c2d33457d 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3flag.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3flag.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-assign.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-assign.dtx
index d5527679b62..32c94b8f302 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-assign.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-assign.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 % \maketitle
 %
 % \begin{documentation}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-aux.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-aux.dtx
index 785c6693069..fc59a450269 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-aux.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-aux.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3fp-aux.dtx Copyright(C) 2011-2019 The LaTeX3 Project
+%% File: l3fp-aux.dtx Copyright (C) 2011-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-basics.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-basics.dtx
index 1cb866748b6..7c2ee489d77 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-basics.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-basics.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-convert.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-convert.dtx
index 2eaf34da4ca..c1de61c7a8a 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-convert.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-convert.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3fp-convert.dtx Copyright(C) 2011-2019 The LaTeX3 Project
+%% File: l3fp-convert.dtx Copyright (C) 2011-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-expo.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-expo.dtx
index d1c3adfdbab..31e59bd0fef 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-expo.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-expo.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-extended.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-extended.dtx
index d6c897f4ce2..13e93ca1ea8 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-extended.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-extended.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-logic.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-logic.dtx
index d28685e956e..60d6921182f 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-logic.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-logic.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-parse.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-parse.dtx
index a35c9ed97bb..1e7f9f81b96 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-parse.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-parse.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-random.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-random.dtx
index c38d03b584a..2167fbaf477 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-random.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-random.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-round.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-round.dtx
index 2c612568e5b..9ab4fb5c80d 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-round.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-round.dtx
@@ -1,6 +1,6 @@
 % \iffalse meta-comment
 %
-%% File: l3fp-round.dtx Copyright(C) 2011-2019 The LaTeX3 Project
+%% File: l3fp-round.dtx Copyright (C) 2011-2019 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License (LPPL), either version 1.3c of this
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-traps.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-traps.dtx
index efeaeaf1b56..74bce8be725 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-traps.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-traps.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 % \maketitle
 %
 % \begin{documentation}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp-trig.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp-trig.dtx
index af79954fe77..5e49a6eca0f 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp-trig.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp-trig.dtx
@@ -38,7 +38,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fp.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fp.dtx
index b3f9a5801ea..8de76e43c29 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fp.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fp.dtx
@@ -47,7 +47,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -91,18 +91,21 @@
 %     $\operatorname{asinh} x$, $\operatorname{acosh} x$,
 %     $\operatorname{atanh} x$, $\operatorname{acoth} x$,
 %     $\operatorname{asech} x$, $\operatorname{acsch} x$.
-%   \item Extrema: $\max(x,y,\ldots)$, $\min(x,y,\ldots)$,
+%   \item Extrema: $\max(x_{1},x_{2},\ldots)$, $\min(x_{1},x_{2},\ldots)$,
 %     $\operatorname{abs}(x)$.
-%   \item Rounding functions ($n=0$ by default, $t=\nan$ by default):
-%     $\operatorname{trunc}(x,n)$ rounds towards zero,
-%     $\operatorname{floor}(x,n)$ rounds towards~$-\infty$,
-%     $\operatorname{ceil}(x,n)$ rounds towards~$+\infty$,
-%     $\operatorname{round}(x,n,t)$ rounds to the closest value, with
+%   \item Rouning functions, controlled by two optional
+%     values,  $n$ (number of places, $0$ by default) and
+%       $t$ (behavior on a tie, $\nan$ by default):
+%     \begin{itemize}
+%     \item $\operatorname{trunc}(x,n)$ rounds towards zero,
+%     \item $\operatorname{floor}(x,n)$ rounds towards~$-\infty$,
+%     \item $\operatorname{ceil}(x,n)$ rounds towards~$+\infty$,
+%     \item $\operatorname{round}(x,n,t)$ rounds to the closest value, with
 %     ties rounded to an even value by default, towards zero if $t=0$,
-%     towards $+\infty$ if $t>0$ and towards $-\infty$ if $t<0$.  And
-%     \emph{(not yet)} modulo, and \enquote{quantize}.
-%   \item Random numbers: $\mathop{rand}()$, $\mathop{randint}(m,n)$ in
-%     all engines except \XeTeX{}.
+%     towards $+\infty$ if $t>0$ and towards $-\infty$ if $t<0$. 
+%     \end{itemize}
+%     And \emph{(not yet)} modulo, and \enquote{quantize}.
+%   \item Random numbers: $\mathop{rand}()$, $\mathop{randint}(m,n)$.
 %   \item Constants: \texttt{pi}, \texttt{deg} (one degree in radians).
 %   \item Dimensions, automatically expressed in points, \emph{e.g.},
 %     \texttt{pc} is~$12$.
@@ -1263,13 +1266,13 @@
 %     \cs{fp_eval:n} \{ |rand()| \}
 %   \end{syntax}
 %   Produces a pseudo-random floating-point number (multiple of
-%   $10^{-16}$) between $0$~included and $1$~excluded.  This is not yet
-%   available in \XeTeX{}.  The random seed can be queried using
+%   $10^{-16}$) between $0$~included and $1$~excluded.  This is not available
+%   in older versions of \XeTeX{}.  The random seed can be queried using
 %   \cs{sys_rand_seed:} and set using \cs{sys_gset_rand_seed:n}.
 %   \begin{texnote}
 %     This is based on pseudo-random numbers provided by the engine's
 %     primitive \tn{pdfuniformdeviate} in \pdfTeX{}, \pTeX{}, \upTeX{}
-%     and \tn{uniformdeviate} in \LuaTeX{}.  The underlying code is
+%     and \tn{uniformdeviate} in \LuaTeX{} and \XeTeX{}.  The underlying code is
 %     based on Metapost, which follows an additive scheme recommended in
 %     Section 3.6 of \enquote{The Art of Computer Programming,
 %     Volume~2}.
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3fparray.dtx b/Master/texmf-dist/source/latex/l3kernel/l3fparray.dtx
index 645c9106276..29f4f0c18fc 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3fparray.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3fparray.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3int.dtx b/Master/texmf-dist/source/latex/l3kernel/l3int.dtx
index 30e5841cc26..7e187b3317f 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3int.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3int.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -791,8 +791,8 @@
 %     \cs{int_rand:nn} \Arg{intexpr_1} \Arg{intexpr_2}
 %   \end{syntax}
 %   Evaluates the two \meta{integer expressions} and produces a
-%   pseudo-random number between the two (with bounds included).  This
-%   is not yet available in \XeTeX{}.
+%   pseudo-random number between the two (with bounds included).
+%   This is not available in older versions of \XeTeX{}.
 % \end{function}
 %
 % \begin{function}[EXP, added = 2018-05-05]{\int_rand:n}
@@ -801,7 +801,7 @@
 %   \end{syntax}
 %   Evaluates the \meta{integer expression} then produces a
 %   pseudo-random number between $1$ and the \meta{intexpr} (included).
-%   This is not yet available in \XeTeX{}.
+%   This is not available in older versions of \XeTeX{}.
 % \end{function}
 %
 % \section{Viewing integers}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3intarray.dtx b/Master/texmf-dist/source/latex/l3kernel/l3intarray.dtx
index df0086a304b..19cc4701f72 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3intarray.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3intarray.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3kernel-functions.dtx b/Master/texmf-dist/source/latex/l3kernel/l3kernel-functions.dtx
index bfa72d34198..d44e2b3f7d6 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3kernel-functions.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3kernel-functions.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3keys.dtx b/Master/texmf-dist/source/latex/l3kernel/l3keys.dtx
index 99872d40ada..131d1a2ebab 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3keys.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3keys.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3luatex.dtx b/Master/texmf-dist/source/latex/l3kernel/l3luatex.dtx
index 6c37f960f78..22c09709aac 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3luatex.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3luatex.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3msg.dtx b/Master/texmf-dist/source/latex/l3kernel/l3msg.dtx
index 504419ac23d..5ee6fdf4a06 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3msg.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3msg.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -213,7 +213,7 @@
 %   |Package| is the standard outcome: see \cs{msg_module_type:n}.
 % \end{function}
 %
-% \begin{function}[EXP, added = 2019-10-10]{\msg_module_name:n}
+% \begin{function}[EXP, added = 2018-10-10]{\msg_module_name:n}
 %   \begin{syntax}
 %     \cs{msg_module_name:n} \Arg{module}
 %   \end{syntax}
@@ -222,7 +222,7 @@
 %   unchanged).
 % \end{function}
 %
-% \begin{function}[EXP, added = 2019-10-10]{\msg_module_type:n}
+% \begin{function}[EXP, added = 2018-10-10]{\msg_module_type:n}
 %   \begin{syntax}
 %     \cs{msg_module_type:n} \Arg{module}
 %   \end{syntax}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3names.dtx b/Master/texmf-dist/source/latex/l3kernel/l3names.dtx
index bc8ebd43ed2..a3a72edd0d8 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3names.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3names.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3prg.dtx b/Master/texmf-dist/source/latex/l3kernel/l3prg.dtx
index e2d840e61bd..2fec4a8a024 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3prg.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3prg.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3prop.dtx b/Master/texmf-dist/source/latex/l3kernel/l3prop.dtx
index dabb81ef207..286596b432c 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3prop.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3prop.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3quark.dtx b/Master/texmf-dist/source/latex/l3kernel/l3quark.dtx
index a14c8a2a0d1..eb3a7e1ea61 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3quark.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3quark.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx b/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx
index a7c8f1db9e8..d4a4a296ced 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3seq.dtx b/Master/texmf-dist/source/latex/l3kernel/l3seq.dtx
index 5cf035feca5..7bf9b87c8b1 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3seq.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3seq.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -294,8 +294,8 @@
 %     \cs{seq_rand_item:N} \meta{seq~var}
 %   \end{syntax}
 %   Selects a pseudo-random item of the \meta{sequence}.  If the
-%   \meta{sequence} is empty the result is empty.  This is not yet
-%   available in \XeTeX{}.
+%   \meta{sequence} is empty the result is empty.
+%   This is not available in older versions of \XeTeX{}.
 %   \begin{texnote}
 %     The result is returned within the \tn{unexpanded}
 %     primitive (\cs{exp_not:n}), which means that the \meta{item}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3skip.dtx b/Master/texmf-dist/source/latex/l3kernel/l3skip.dtx
index 4b74e4e4e0c..7139235e963 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3skip.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3skip.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3sort.dtx b/Master/texmf-dist/source/latex/l3kernel/l3sort.dtx
index a3e71fbdf6f..a69607a88e5 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3sort.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3sort.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3str.dtx b/Master/texmf-dist/source/latex/l3kernel/l3str.dtx
index 4b8ea892e4c..c9e4f4ed138 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3str.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3str.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -731,9 +731,7 @@
 %     \emph{only} the Latin alphabet characters A--Z are case-folded
 %     (\emph{i.e.}~the \textsc{ascii} range which coincides with
 %     \textsc{utf-8}). Full \textsc{utf-8} support is available with both
-%     \XeTeX{} and \LuaTeX{}, subject only to the fact that \XeTeX{} in
-%     particular has issues with characters of code above hexadecimal
-%     $0\mathrm{xFFFF}$ when interacting with \cs{tl_to_str:n}.
+%     \XeTeX{} and \LuaTeX{}.
 %   \end{texnote}
 % \end{function}
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx b/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
index 557739569f1..c188ce7fc7a 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3tl-analysis.dtx b/Master/texmf-dist/source/latex/l3kernel/l3tl-analysis.dtx
index 1d2527dc041..f3025067d07 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3tl-analysis.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3tl-analysis.dtx
@@ -42,7 +42,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx b/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx
index 1d44094605b..6bd75f94949 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -1016,8 +1016,8 @@
 %     \cs{tl_rand_item:n} \Arg{token list}
 %   \end{syntax}
 %   Selects a pseudo-random item of the \meta{token list}.  If the
-%   \meta{token list} is blank, the result is empty.  This is not yet
-%   available in \XeTeX{}.
+%   \meta{token list} is blank, the result is empty.
+%   This is not available in older versions of \XeTeX{}.
 %   \begin{texnote}
 %     The result is returned within the \tn{unexpanded}
 %     primitive (\cs{exp_not:n}), which means that the \meta{item}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3token.dtx b/Master/texmf-dist/source/latex/l3kernel/l3token.dtx
index e2046695e6f..7a84c08c24d 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3token.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3token.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -139,10 +139,11 @@
 %     \item $8$ (math subscript)
 %     \item $11$ (letter)
 %     \item $12$ (other)
-%     \item $13$ (active) (not \XeTeX{})
+%     \item $13$ (active)
 %   \end{itemize}
 %   and other values raise an error. The \meta{charcode} may be any one valid
 %   for the engine in use.
+%   Active characters cannot be generated in older versions of \XeTeX{}.
 % \end{function}
 %
 % \begin{variable}[added = 2011-09-05]{\c_catcode_other_space_tl}
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3unicode.dtx b/Master/texmf-dist/source/latex/l3kernel/l3unicode.dtx
index ef39b6e3dc1..23a471d1a48 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3unicode.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3unicode.dtx
@@ -41,7 +41,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2019-01-01}
+% \date{Released 2019-01-12}
 %
 % \maketitle
 %
@@ -73,7 +73,9 @@
 % As only the data needs to remain at the end of this process, everything
 % is set up inside a group. The only thing that is outside is creating a
 % stream: they are global anyway and it is best to force a stream for
-% all engines.
+% all engines. For performance reasons, some of the code here is very
+% low-level: the material is read during loading \pkg{expl3} in package
+% mode.
 %    \begin{macrocode}
 \ior_new:N \g_@@_data_ior
 \bool_lazy_or:nnTF { \sys_if_engine_luatex_p: } { \sys_if_engine_xetex_p: }
@@ -84,6 +86,29 @@
 %    \begin{macrocode}
       \cs_set_eq:NN \@@_generate:w \tex_Uchar:D
 %    \end{macrocode}
+%   A fast local implementation for generating characters.
+%    \begin{macrocode}
+      \cs_set:Npx \@@_generate:n #1
+        {
+          \sys_if_engine_luatex:TF
+            {
+              \exp_not:N \lua_now:e
+                {
+                  l3kernel.charcat
+                    (
+                      \exp_not:N \tex_number:D #1 ,
+                      \exp_not:N \tex_the:D \tex_catcode:D #1
+                    )
+                }
+            }
+            {
+              \exp_not:N \tex_Ucharcat:D
+                \exp_not:N \tex_number:D #1 ~
+                \c_space_tl
+                \exp_not:N \tex_the:D \tex_catcode:D #1 ~
+            }
+        } 
+%    \end{macrocode}
 % Parse the main Unicode data file for title case exceptions (the one-to-one
 % lower and upper case mappings it contains are all be covered by the \TeX{}
 % data). There are no comments in the main data file so this can be done using
@@ -96,23 +121,22 @@
       \cs_set_protected:Npn \@@_data_auxii:w
         #1 ; #2 ; #3 ; #4 ; #5 ; #6 ; #7 \q_stop
         {
-          \tl_if_blank:nF {#7}
-            {
-              \str_if_eq:nnF {#5} {#7}
-                {
-                  \tl_const:cx
-                    { c_@@_mixed_case_ \@@_generate:w "#1 _tl }
-                    {
-                       \char_generate:nn { "#7 }
-                        { \char_value_catcode:n { "#7 } }
-                    }
-                }
-            }
+          \cs_set_nopar:Npn \l_@@_tmpa_tl {#7}
+          \reverse_if:N \if_meaning:w \l_@@_tmpa_tl \c_empty_tl
+            \cs_set_nopar:Npn \l_@@_tmpb_tl {#5}
+            \reverse_if:N \if_meaning:w \l_@@_tmpa_tl \l_@@_tmpb_tl
+              \tl_const:cx
+                { c_@@_mixed_case_ \@@_generate:w "#1 _tl }
+                { \@@_generate:n { "#7 } }
+            \fi:
+          \fi:
         }
       \ior_map_inline:Nn \g_@@_data_ior
         {
-          \tl_if_blank:nF {#1}
-            { \@@_data_auxi:w #1 \q_stop }
+          \cs_set_nopar:Npn \l_@@_tmpa_tl {#1}
+          \reverse_if:N \if_meaning:w \l_@@_tmpa_tl \c_space_tl
+            \@@_data_auxi:w #1 \q_stop
+          \fi:
         }
       \ior_close:N \g_@@_data_ior
 %    \end{macrocode}
@@ -126,46 +150,37 @@
       \ior_open:Nn \g_@@_data_ior { CaseFolding.txt }
       \cs_set_protected:Npn \@@_data_auxi:w #1 ;~ #2 ;~ #3 ; #4 \q_stop
         {
-          \str_if_eq:nnTF {#2} { C }
-            {
-              \int_compare:nNnF
-                { \char_value_lccode:n {"#1} } = {"#3}
-                {
-                  \tl_const:cx
-                    { c_@@_fold_case_ \@@_generate:w "#1 _tl }
-                    {
-                      \char_generate:nn { "#3 }
-                        { \char_value_catcode:n { "#3 } }
-                    }
-                }
-            }
-            {
-              \str_if_eq:nnT {#2} { F }
-               { \@@_data_auxii:w #1 ~ #3 ~ \q_stop }
-            }
+          \if:w \tl_head:n { #2 ? } C
+            \reverse_if:N \if_int_compare:w
+              \char_value_lccode:n {"#1} = "#3 ~
+              \tl_const:cx
+                { c_@@_fold_case_ \@@_generate:w "#1 _tl }
+                { \@@_generate:n { "#3 } }
+            \fi:
+          \else:
+            \if:w \tl_head:n { #2 ? } F
+              \@@_data_auxii:w #1 ~ #3 ~ \q_stop
+            \fi:
+          \fi:
         }
       \cs_set_protected:Npn \@@_data_auxii:w #1 ~ #2 ~ #3 ~ #4 \q_stop
         {
           \tl_const:cx { c_@@_fold_case_ \@@_generate:w "#1 _tl }
             {
-              \char_generate:nn { "#2 }
-                { \char_value_catcode:n { "#2 } }
-              \char_generate:nn { "#3 }
-                { \char_value_catcode:n { "#3 } }
+              \@@_generate:n { "#2 }
+              \@@_generate:n { "#3 }
               \tl_if_blank:nF {#4}
-                {
-                  \char_generate:nn { "#4 }
-                    { \char_value_catcode:n { "#4 } }
-                }
+                { \@@_generate:n { "#4 } }
             }
         }
       \ior_str_map_inline:Nn \g_@@_data_ior
         {
-          \tl_if_blank:nF {#1}
-            {
-              \str_if_eq:eeF { \tl_head:n {#1} } { \c_hash_str }
-                { \@@_data_auxi:w #1 \q_stop }
-            }
+          \cs_set_nopar:Npn \l_@@_tmpa_tl {#1}
+          \reverse_if:N \if_meaning:w \l_@@_tmpa_tl \c_empty_tl
+             \reverse_if:N \if:w \tl_head:n { #1 ? } \c_hash_str
+               \@@_data_auxi:w #1 \q_stop
+             \fi:
+          \fi:
         }
       \ior_close:N \g_@@_data_ior
 %    \end{macrocode}
@@ -189,31 +204,30 @@
             {
               \tl_const:cx { c_@@_ #2 _case_ \@@_generate:w "#1 _tl }
                 {
-                  \char_generate:nn { "#3 }
-                    { \char_value_catcode:n { "#3 } }
-                  \char_generate:nn { "#4 }
-                    { \char_value_catcode:n { "#4 } }
+                  \@@_generate:n { "#3 }
+                  \@@_generate:n { "#4 }
                   \tl_if_blank:nF {#5}
-                    {
-                      \char_generate:nn { "#5 }
-                        { \char_value_catcode:n { "#5 } }
-                    }
+                    { \@@_generate:n { "#5 } }
                 }
             }
         }
       \ior_str_map_inline:Nn \g_@@_data_ior
         {
-          \tl_if_blank:nF {#1}
-            {
-              \str_if_eq:eeTF { \tl_head:n {#1} } { \c_hash_str }
+          \cs_set_nopar:Npn \l_@@_tmpa_tl {#1}
+          \reverse_if:N \if_meaning:w \l_@@_tmpa_tl \c_empty_tl
+            \if:w \tl_head:n { #1 ? } \c_hash_str
+              \cs_set_nopar:Npx \l_@@_tmpb_tl
                 {
-                  \str_if_eq:eeT
-                    {#1}
-                    { \c_hash_str \c_space_tl Conditional~Mappings }
-                    { \ior_map_break: }
+                  \c_hash_str \c_space_tl
+                  \tl_to_str:n { Conditional~Mappings }
                 }
-                { \@@_data_auxi:w #1 \q_stop }
-            }
+              \if_meaning:w \l_@@_tmpa_tl \l_@@_tmpb_tl
+                \exp_after:wN \exp_after:wN \exp_after:wN \ior_map_break:
+              \fi:
+            \else:
+              \@@_data_auxi:w #1 \q_stop
+            \fi:
+          \fi:
         }
       \ior_close:N \g_@@_data_ior
    \group_end: