CTAN sync 202004070302

85 files changed, 137 insertions, 82 deletions

diff --git a/macros/latex/contrib/l3kernel/CHANGELOG.md b/macros/latex/contrib/l3kernel/CHANGELOG.md
index 6076561c5e..935c8f3212 100644
--- a/macros/latex/contrib/l3kernel/CHANGELOG.md
+++ b/macros/latex/contrib/l3kernel/CHANGELOG.md
@@ -7,6 +7,16 @@ this project uses date-based 'snapshot' version identifiers.
 
 ## [Unreleased]
 
+## [2020-04-06]
+
+### Added
+- Control for start-of-titecasing: see `\l_text_titlecase_check_letter_bool`
+
+### Fixed
+- Nesting of `\seq_shuffle:N` in another sequence mapping (issue #687)
+- `\ior_shell_open:Nn` in engines other than LuaTeX - shell commands didn't
+  execute, plus the command call would be left in the input stream.
+
 ## [2020-03-06]
 
 ### Added
@@ -655,7 +665,8 @@ this project uses date-based 'snapshot' version identifiers.
 - Step func­tions have been added for dim vari­ables,
   e.g. `\dim_step_in­line:nnnn`
 
-[Unreleased]: https://github.com/latex3/latex3/compare/2020-03-06...HEAD
+[Unreleased]: https://github.com/latex3/latex3/compare/2020-04-06...HEAD
+[2020-04-06]: https://github.com/latex3/latex3/compare/2020-03-06...2020-04-06
 [2020-03-06]: https://github.com/latex3/latex3/compare/2020-03-03...2020-03-06
 [2020-03-03]: https://github.com/latex3/latex3/compare/2020-02-25...2020-03-03
 [2020-02-25]: https://github.com/latex3/latex3/compare/2020-02-21...2020-02-25
diff --git a/macros/latex/contrib/l3kernel/README.md b/macros/latex/contrib/l3kernel/README.md
index 8cfabd40d7..527917484f 100644
--- a/macros/latex/contrib/l3kernel/README.md
+++ b/macros/latex/contrib/l3kernel/README.md
@@ -1,7 +1,7 @@
 LaTeX3 Programming Conventions
 ==============================
 
-Release 2020-03-06
+Release 2020-04-06
 
 Overview
 --------
diff --git a/macros/latex/contrib/l3kernel/expl3.dtx b/macros/latex/contrib/l3kernel/expl3.dtx
index 080baf1bed..b2367b1fa5 100644
--- a/macros/latex/contrib/l3kernel/expl3.dtx
+++ b/macros/latex/contrib/l3kernel/expl3.dtx
@@ -24,7 +24,7 @@
 %
 %<*driver|generic|package|2ekernel>
 %</driver|generic|package|2ekernel>
-\def\ExplFileDate{2020-03-06}%
+\def\ExplFileDate{2020-04-06}%
 %<*driver>
 \documentclass[full]{l3doc}
 \usepackage{graphicx}
@@ -51,7 +51,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/expl3.pdf b/macros/latex/contrib/l3kernel/expl3.pdf
index 0476ca9dc7..b22e3aa8d6 100644
--- a/macros/latex/contrib/l3kernel/expl3.pdf
+++ b/macros/latex/contrib/l3kernel/expl3.pdf
diff --git a/macros/latex/contrib/l3kernel/interface3.pdf b/macros/latex/contrib/l3kernel/interface3.pdf
index 6f0ae79a85..0f72a47968 100644
--- a/macros/latex/contrib/l3kernel/interface3.pdf
+++ b/macros/latex/contrib/l3kernel/interface3.pdf
diff --git a/macros/latex/contrib/l3kernel/interface3.tex b/macros/latex/contrib/l3kernel/interface3.tex
index 1e774cd9d8..afdedf34b3 100644
--- a/macros/latex/contrib/l3kernel/interface3.tex
+++ b/macros/latex/contrib/l3kernel/interface3.tex
@@ -54,7 +54,7 @@ for those people who are interested.
          {latex-team@latex-project.org}%
    }%
 }
-\date{Released 2020-03-06}
+\date{Released 2020-04-06}
 
 \pagenumbering{roman}
 \maketitle
diff --git a/macros/latex/contrib/l3kernel/l3alloc.dtx b/macros/latex/contrib/l3kernel/l3alloc.dtx
index 190b3edc37..b319591df4 100644
--- a/macros/latex/contrib/l3kernel/l3alloc.dtx
+++ b/macros/latex/contrib/l3kernel/l3alloc.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3basics.dtx b/macros/latex/contrib/l3kernel/l3basics.dtx
index 349ec43235..7ec163623a 100644
--- a/macros/latex/contrib/l3kernel/l3basics.dtx
+++ b/macros/latex/contrib/l3kernel/l3basics.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3bootstrap.dtx b/macros/latex/contrib/l3kernel/l3bootstrap.dtx
index 4427850302..9d6f2cce41 100644
--- a/macros/latex/contrib/l3kernel/l3bootstrap.dtx
+++ b/macros/latex/contrib/l3kernel/l3bootstrap.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3box.dtx b/macros/latex/contrib/l3kernel/l3box.dtx
index 91ddc238a6..638396d4e6 100644
--- a/macros/latex/contrib/l3kernel/l3box.dtx
+++ b/macros/latex/contrib/l3kernel/l3box.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3candidates.dtx b/macros/latex/contrib/l3kernel/l3candidates.dtx
index e346f674a7..bb16a00a6e 100644
--- a/macros/latex/contrib/l3kernel/l3candidates.dtx
+++ b/macros/latex/contrib/l3kernel/l3candidates.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -1405,6 +1405,9 @@
 % \begin{macro}{\ior_shell_open:Nn}
 % \begin{macro}{\@@_shell_open:nN}
 %   Actually much easier than either the standard open or input versions!
+%   When calling \cs{__kernel_ior_open:Nn} the file the pipe is added to
+%   signal a shell command, but the quotes are not added yet---they are
+%   added later by \cs{__kernel_file_name_quote:n}.
 %    \begin{macrocode}
 \cs_new_protected:Npn \ior_shell_open:Nn #1#2
   {
@@ -1419,7 +1422,7 @@
         \__kernel_msg_error:nnx
           { kernel } { quote-in-shell } {#1}
       }
-      { \__kernel_ior_open:Nn #2 { "|#1" } }
+      { \__kernel_ior_open:Nn #2 { |#1 } }
   }
 \__kernel_msg_new:nnnn { kernel } { pipe-failed }
   { Cannot~run~piped~system~commands. }
diff --git a/macros/latex/contrib/l3kernel/l3clist.dtx b/macros/latex/contrib/l3kernel/l3clist.dtx
index 3c79a276d9..6b58b6020f 100644
--- a/macros/latex/contrib/l3kernel/l3clist.dtx
+++ b/macros/latex/contrib/l3kernel/l3clist.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3coffins.dtx b/macros/latex/contrib/l3kernel/l3coffins.dtx
index 6824a83a2d..1d51c40623 100644
--- a/macros/latex/contrib/l3kernel/l3coffins.dtx
+++ b/macros/latex/contrib/l3kernel/l3coffins.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3color-base.dtx b/macros/latex/contrib/l3kernel/l3color-base.dtx
index b5c9e39189..66141b7912 100644
--- a/macros/latex/contrib/l3kernel/l3color-base.dtx
+++ b/macros/latex/contrib/l3kernel/l3color-base.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3debug.dtx b/macros/latex/contrib/l3kernel/l3debug.dtx
index 04ba29e915..e6baacd677 100644
--- a/macros/latex/contrib/l3kernel/l3debug.dtx
+++ b/macros/latex/contrib/l3kernel/l3debug.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3deprecation.dtx b/macros/latex/contrib/l3kernel/l3deprecation.dtx
index cf9733ef68..674ad81457 100644
--- a/macros/latex/contrib/l3kernel/l3deprecation.dtx
+++ b/macros/latex/contrib/l3kernel/l3deprecation.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3doc.dtx b/macros/latex/contrib/l3kernel/l3doc.dtx
index d474ceabd8..2da64b57e2 100644
--- a/macros/latex/contrib/l3kernel/l3doc.dtx
+++ b/macros/latex/contrib/l3kernel/l3doc.dtx
@@ -79,7 +79,7 @@ and all files in that bundle must be distributed together.
 %
 % \title{The \cls{l3doc} class}
 % \author{\Team}
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 % \maketitle
 % \tableofcontents
 %
diff --git a/macros/latex/contrib/l3kernel/l3docstrip.dtx b/macros/latex/contrib/l3kernel/l3docstrip.dtx
index 1e7a512c56..e9eacfdd02 100644
--- a/macros/latex/contrib/l3kernel/l3docstrip.dtx
+++ b/macros/latex/contrib/l3kernel/l3docstrip.dtx
@@ -63,7 +63,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3docstrip.pdf b/macros/latex/contrib/l3kernel/l3docstrip.pdf
index e65e1058b3..d3f4a45760 100644
--- a/macros/latex/contrib/l3kernel/l3docstrip.pdf
+++ b/macros/latex/contrib/l3kernel/l3docstrip.pdf
diff --git a/macros/latex/contrib/l3kernel/l3expan.dtx b/macros/latex/contrib/l3kernel/l3expan.dtx
index f356ac22df..f40faf0c14 100644
--- a/macros/latex/contrib/l3kernel/l3expan.dtx
+++ b/macros/latex/contrib/l3kernel/l3expan.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3file.dtx b/macros/latex/contrib/l3kernel/l3file.dtx
index 51506ece3c..55d906d062 100644
--- a/macros/latex/contrib/l3kernel/l3file.dtx
+++ b/macros/latex/contrib/l3kernel/l3file.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3final.dtx b/macros/latex/contrib/l3kernel/l3final.dtx
index febd7f7aa9..537880051a 100644
--- a/macros/latex/contrib/l3kernel/l3final.dtx
+++ b/macros/latex/contrib/l3kernel/l3final.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3flag.dtx b/macros/latex/contrib/l3kernel/l3flag.dtx
index d807c132ed..711a809a62 100644
--- a/macros/latex/contrib/l3kernel/l3flag.dtx
+++ b/macros/latex/contrib/l3kernel/l3flag.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-assign.dtx b/macros/latex/contrib/l3kernel/l3fp-assign.dtx
index dab8dc4d7d..ece2128794 100644
--- a/macros/latex/contrib/l3kernel/l3fp-assign.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-assign.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 % \maketitle
 %
 % \begin{documentation}
diff --git a/macros/latex/contrib/l3kernel/l3fp-aux.dtx b/macros/latex/contrib/l3kernel/l3fp-aux.dtx
index f9601e4d76..1b9d63ff59 100644
--- a/macros/latex/contrib/l3kernel/l3fp-aux.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-aux.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-basics.dtx b/macros/latex/contrib/l3kernel/l3fp-basics.dtx
index 75803be1af..501ae09c6e 100644
--- a/macros/latex/contrib/l3kernel/l3fp-basics.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-basics.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-convert.dtx b/macros/latex/contrib/l3kernel/l3fp-convert.dtx
index 03e40eae38..be5bb9530e 100644
--- a/macros/latex/contrib/l3kernel/l3fp-convert.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-convert.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-expo.dtx b/macros/latex/contrib/l3kernel/l3fp-expo.dtx
index 8489efefae..35fae0ce49 100644
--- a/macros/latex/contrib/l3kernel/l3fp-expo.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-expo.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-extended.dtx b/macros/latex/contrib/l3kernel/l3fp-extended.dtx
index f08e256226..026fdda410 100644
--- a/macros/latex/contrib/l3kernel/l3fp-extended.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-extended.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-logic.dtx b/macros/latex/contrib/l3kernel/l3fp-logic.dtx
index d58c523d9d..b81a1066e3 100644
--- a/macros/latex/contrib/l3kernel/l3fp-logic.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-logic.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-parse.dtx b/macros/latex/contrib/l3kernel/l3fp-parse.dtx
index 0d125aeaec..e69b63ba05 100644
--- a/macros/latex/contrib/l3kernel/l3fp-parse.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-parse.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-random.dtx b/macros/latex/contrib/l3kernel/l3fp-random.dtx
index 17bd04d9ee..b2bcf484a1 100644
--- a/macros/latex/contrib/l3kernel/l3fp-random.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-random.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-round.dtx b/macros/latex/contrib/l3kernel/l3fp-round.dtx
index 5063fa4105..59b7f978ee 100644
--- a/macros/latex/contrib/l3kernel/l3fp-round.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-round.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp-traps.dtx b/macros/latex/contrib/l3kernel/l3fp-traps.dtx
index 07e29f0bb4..4b394358d6 100644
--- a/macros/latex/contrib/l3kernel/l3fp-traps.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-traps.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 % \maketitle
 %
 % \begin{documentation}
diff --git a/macros/latex/contrib/l3kernel/l3fp-trig.dtx b/macros/latex/contrib/l3kernel/l3fp-trig.dtx
index 3fef46a6c2..cbe388e0fd 100644
--- a/macros/latex/contrib/l3kernel/l3fp-trig.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp-trig.dtx
@@ -40,7 +40,7 @@
 %          {latex-team@latex-project.org}^^A
 %    }^^A
 % }
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fp.dtx b/macros/latex/contrib/l3kernel/l3fp.dtx
index e4dbc76a8e..61904f6ca4 100644
--- a/macros/latex/contrib/l3kernel/l3fp.dtx
+++ b/macros/latex/contrib/l3kernel/l3fp.dtx
@@ -49,7 +49,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3fparray.dtx b/macros/latex/contrib/l3kernel/l3fparray.dtx
index 3016f666fb..f615473e38 100644
--- a/macros/latex/contrib/l3kernel/l3fparray.dtx
+++ b/macros/latex/contrib/l3kernel/l3fparray.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3int.dtx b/macros/latex/contrib/l3kernel/l3int.dtx
index 8d9fc1c895..f116ca72ce 100644
--- a/macros/latex/contrib/l3kernel/l3int.dtx
+++ b/macros/latex/contrib/l3kernel/l3int.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3intarray.dtx b/macros/latex/contrib/l3kernel/l3intarray.dtx
index 0219861d14..b83c9b2a90 100644
--- a/macros/latex/contrib/l3kernel/l3intarray.dtx
+++ b/macros/latex/contrib/l3kernel/l3intarray.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3kernel-functions.dtx b/macros/latex/contrib/l3kernel/l3kernel-functions.dtx
index b58d0fdc27..40e53bb11f 100644
--- a/macros/latex/contrib/l3kernel/l3kernel-functions.dtx
+++ b/macros/latex/contrib/l3kernel/l3kernel-functions.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3keys.dtx b/macros/latex/contrib/l3kernel/l3keys.dtx
index ab068d5786..fb7b8050b1 100644
--- a/macros/latex/contrib/l3kernel/l3keys.dtx
+++ b/macros/latex/contrib/l3kernel/l3keys.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3legacy.dtx b/macros/latex/contrib/l3kernel/l3legacy.dtx
index 14320d3ada..fe455e7abd 100644
--- a/macros/latex/contrib/l3kernel/l3legacy.dtx
+++ b/macros/latex/contrib/l3kernel/l3legacy.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3luatex.dtx b/macros/latex/contrib/l3kernel/l3luatex.dtx
index 89185a2186..2aeaa1179d 100644
--- a/macros/latex/contrib/l3kernel/l3luatex.dtx
+++ b/macros/latex/contrib/l3kernel/l3luatex.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -158,7 +158,7 @@
 %   \begin{syntax}
 %     |l3kernel.filemdfivesum(|\meta{file}|)|
 %   \end{syntax}
-%   Returns the of the MD5 sum of the file contents read as bytes; note that
+%   Returns the MD5 sum of the file contents read as bytes; note that
 %   the result will depend on the nature of the line endings used in the file,
 %   in contrast to normal \TeX{} behaviour. If the \meta{file} is not found,
 %   nothing is returned with \emph{no error raised}.
@@ -168,7 +168,7 @@
 %   \begin{syntax}
 %     |l3kernel.filemoddate(|\meta{file}|)|
 %   \end{syntax}
-%   Returns the of the date/time of last modification of the \meta{file} in the
+%   Returns the date/time of last modification of the \meta{file} in the
 %   format
 %   \begin{quote}
 %     |D:|\meta{year}\meta{month}\meta{day}\meta{hour}\meta{minute}^^A
diff --git a/macros/latex/contrib/l3kernel/l3msg.dtx b/macros/latex/contrib/l3kernel/l3msg.dtx
index 68264ca6d1..240649d5fa 100644
--- a/macros/latex/contrib/l3kernel/l3msg.dtx
+++ b/macros/latex/contrib/l3kernel/l3msg.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3names.dtx b/macros/latex/contrib/l3kernel/l3names.dtx
index ccd26ea9c3..93251497f4 100644
--- a/macros/latex/contrib/l3kernel/l3names.dtx
+++ b/macros/latex/contrib/l3kernel/l3names.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3news.pdf b/macros/latex/contrib/l3kernel/l3news.pdf
index a1679a1bb6..1e3e01d361 100644
--- a/macros/latex/contrib/l3kernel/l3news.pdf
+++ b/macros/latex/contrib/l3kernel/l3news.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news01.pdf b/macros/latex/contrib/l3kernel/l3news01.pdf
index 1e589f9495..f1a37d4ba5 100644
--- a/macros/latex/contrib/l3kernel/l3news01.pdf
+++ b/macros/latex/contrib/l3kernel/l3news01.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news02.pdf b/macros/latex/contrib/l3kernel/l3news02.pdf
index d73d5c8eb0..986777e47c 100644
--- a/macros/latex/contrib/l3kernel/l3news02.pdf
+++ b/macros/latex/contrib/l3kernel/l3news02.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news03.pdf b/macros/latex/contrib/l3kernel/l3news03.pdf
index ab1f6a0033..243cad0aab 100644
--- a/macros/latex/contrib/l3kernel/l3news03.pdf
+++ b/macros/latex/contrib/l3kernel/l3news03.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news04.pdf b/macros/latex/contrib/l3kernel/l3news04.pdf
index bd129df812..81c7f2855a 100644
--- a/macros/latex/contrib/l3kernel/l3news04.pdf
+++ b/macros/latex/contrib/l3kernel/l3news04.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news05.pdf b/macros/latex/contrib/l3kernel/l3news05.pdf
index 04a96e19f3..d429260a99 100644
--- a/macros/latex/contrib/l3kernel/l3news05.pdf
+++ b/macros/latex/contrib/l3kernel/l3news05.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news06.pdf b/macros/latex/contrib/l3kernel/l3news06.pdf
index 7bfbc1aa2b..6cbf184b1a 100644
--- a/macros/latex/contrib/l3kernel/l3news06.pdf
+++ b/macros/latex/contrib/l3kernel/l3news06.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news07.pdf b/macros/latex/contrib/l3kernel/l3news07.pdf
index 8f06de95d6..104ddd98a3 100644
--- a/macros/latex/contrib/l3kernel/l3news07.pdf
+++ b/macros/latex/contrib/l3kernel/l3news07.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news08.pdf b/macros/latex/contrib/l3kernel/l3news08.pdf
index fac7c0dd0b..8ee6c24654 100644
--- a/macros/latex/contrib/l3kernel/l3news08.pdf
+++ b/macros/latex/contrib/l3kernel/l3news08.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news09.pdf b/macros/latex/contrib/l3kernel/l3news09.pdf
index c5a0920919..654eb6bf26 100644
--- a/macros/latex/contrib/l3kernel/l3news09.pdf
+++ b/macros/latex/contrib/l3kernel/l3news09.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news10.pdf b/macros/latex/contrib/l3kernel/l3news10.pdf
index 2ef13294d4..095c990ffc 100644
--- a/macros/latex/contrib/l3kernel/l3news10.pdf
+++ b/macros/latex/contrib/l3kernel/l3news10.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news11.pdf b/macros/latex/contrib/l3kernel/l3news11.pdf
index 525e148d86..b18962335f 100644
--- a/macros/latex/contrib/l3kernel/l3news11.pdf
+++ b/macros/latex/contrib/l3kernel/l3news11.pdf
diff --git a/macros/latex/contrib/l3kernel/l3news12.pdf b/macros/latex/contrib/l3kernel/l3news12.pdf
index 529cfc06b1..50c6cdcfeb 100644
--- a/macros/latex/contrib/l3kernel/l3news12.pdf
+++ b/macros/latex/contrib/l3kernel/l3news12.pdf
diff --git a/macros/latex/contrib/l3kernel/l3prefixes.csv b/macros/latex/contrib/l3kernel/l3prefixes.csv
index 7e5025f08c..642979ef6e 100644
--- a/macros/latex/contrib/l3kernel/l3prefixes.csv
+++ b/macros/latex/contrib/l3kernel/l3prefixes.csv
@@ -11,6 +11,7 @@ ampersand,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,
 arch,archaeologie,Lukas C. Bossert,http://www.biblatex-archaeologie.de,https://github.com/LukasCBossert/biblatex-archaeologie.git,https://github.com/LukasCBossert/biblatex-archaeologie/issues,2017-03-24,2017-03-24,
 array,hobby,Andrew Stacey,,,,2013-03-16,2013-03-16,
 atsign,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2018-05-12,2018-05-12,
+avm,langsci-avm,Felix Kopecky,https://ctan.org/pkg/langsci-avm,https://github.com/langsci/langsci-avm,https://github.com/langsci/langsci-avm/issues,2020-03-11,2020-03-11,
 backend,l3backend,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2019-06-04,2019-06-04,
 backslash,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2018-05-12,2018-05-12,
 bool,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-27,2012-09-27,
@@ -49,6 +50,7 @@ ducksay,ducksay,Jonathan P. Spratte,https://github.com/Skillmon/ltx_ducksay,git@
 duckuments,duckuments,Jonathan P. Spratte,https://github.com/Skillmon/ltx_duckuments,git@github.com:Skillmon/ltx_duckuments.git,https://github.com/Skillmon/ltx_duckuments/issues,2019-06-07,2019-06-07,
 e,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2018-05-12,2018-05-12,
 else,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-28,2012-09-28,
+emoji,emoji,Xiangdong Zeng,https://github.com/stone-zeng/latex-emoji,https://github.com/stone-zeng/latex-emoji.git,https://github.com/stone-zeng/latex-emoji/issues,2020-03-08,2020-03-08,
 empty,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2018-05-12,2018-05-12,
 enotez,enotez,Clemens Niederberger,https://bitbucket.org/cgnieder/enotez/,git@bitbucket.org:cgnieder/enotez.git,https://bitbucket.org/cgnieder/enotez/issues,2013-03-16,2013-03-16,
 etex,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-27,2012-09-27,
@@ -57,9 +59,9 @@ expl,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https
 exsheets,exsheets,Clemens Niederberger,https://bitbucket.org/cgnieder/exsheets/,git@bitbucket.org:cgnieder/exsheets.git,https://bitbucket.org/cgnieder/exsheets/issues,2013-03-16,2013-03-16,
 extblx,biblatex-ext,Moritz Wemheuer,https://github.com/moewew/biblatex-ext/,https://github.com/moewew/biblatex-ext.git,https://github.com/moewew/biblatex-ext/issues,2020-02-09,2020-02-09,
 exwf,exwrapfig,Takuto Asakura,https://github.com/wtsnjp/exwrapfig,https://github.com/wtsnjp/exwrapfig.git,https://github.com/wtsnjp/exwrapfig/issues,2018-06-07,2018-06-07,
-fdu,fduthesis,Xiangdong Zeng,https://github.com/Stone-Zeng/fduthesis,https://github.com/Stone-Zeng/fduthesis.git,https://github.com/Stone-Zeng/fduthesis/issues,2018-06-14,2018-06-14,
-fdudoc,fduthesis,Xiangdong Zeng,https://github.com/Stone-Zeng/fduthesis,https://github.com/Stone-Zeng/fduthesis.git,https://github.com/Stone-Zeng/fduthesis/issues,2018-06-14,2018-06-14,
-fdulogo,fduthesis,Xiangdong Zeng,https://github.com/Stone-Zeng/fduthesis,https://github.com/Stone-Zeng/fduthesis.git,https://github.com/Stone-Zeng/fduthesis/issues,2018-06-14,2018-06-14,
+fdu,fduthesis,Xiangdong Zeng,https://github.com/stone-zeng/fduthesis,https://github.com/stone-zeng/fduthesis.git,https://github.com/stone-zeng/fduthesis/issues,2018-06-14,2020-03-08,
+fdudoc,fduthesis,Xiangdong Zeng,https://github.com/stone-zeng/fduthesis,https://github.com/stone-zeng/fduthesis.git,https://github.com/stone-zeng/fduthesis/issues,2018-06-14,2020-03-08,
+fdulogo,fduthesis,Xiangdong Zeng,https://github.com/stone-zeng/fduthesis,https://github.com/stone-zeng/fduthesis.git,https://github.com/stone-zeng/fduthesis/issues,2018-06-14,2020-03-08,
 fi,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-28,2012-09-28,
 file,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-27,2012-09-27,
 flag,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-27,2017-02-13,
@@ -192,6 +194,6 @@ xsb,xsavebox,Alexander Grahn,,,,2016-02-26,2016-02-26,
 xtemplate,xtemplate,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2012-09-27,2012-09-27,
 yoin,yoin,Tom Hejda,https://github.com/tohecz/yoin,https://github.com/tohecz/yoin.git,https://github.com/tohecz/yoin/issues,2016-02-22,2016-02-22,
 zero,l3kernel,The LaTeX3 Project,https://www.latex-project.org/latex3.html,https://github.com/latex3/latex3.git,https://github.com/latex3/latex3/issues,2018-05-12,2018-05-12,
-zhlipsum,zhlipsum,Xiangdong Zeng,https://github.com/Stone-Zeng/zhlipsum,https://github.com/Stone-Zeng/zhlipsum.git,https://github.com/Stone-Zeng/zhlipsum/issues,2018-06-14,2018-06-14,
+zhlipsum,zhlipsum,Xiangdong Zeng,https://github.com/stone-zeng/zhlipsum,https://github.com/stone-zeng/zhlipsum.git,https://github.com/stone-zeng/zhlipsum/issues,2018-06-14,2018-06-14,
 zhnum,zhnumber,Qing Lee,https://github.com/CTeX-org/ctex-kit,https://github.com/CTeX-org/ctex-kit.git,https://github.com/CTeX-org/ctex-kit/issues,2013-03-16,2013-05-26,
 zxjt,zxjatype,Takayuki Yato,,,,2013-03-16,2013-03-16,
diff --git a/macros/latex/contrib/l3kernel/l3prefixes.pdf b/macros/latex/contrib/l3kernel/l3prefixes.pdf
index 3500aa840c..ba39dffe84 100644
--- a/macros/latex/contrib/l3kernel/l3prefixes.pdf
+++ b/macros/latex/contrib/l3kernel/l3prefixes.pdf
diff --git a/macros/latex/contrib/l3kernel/l3prg.dtx b/macros/latex/contrib/l3kernel/l3prg.dtx
index 8058df1d86..469c43fb0e 100644
--- a/macros/latex/contrib/l3kernel/l3prg.dtx
+++ b/macros/latex/contrib/l3kernel/l3prg.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3prop.dtx b/macros/latex/contrib/l3kernel/l3prop.dtx
index 3bacdb1374..f728416ae2 100644
--- a/macros/latex/contrib/l3kernel/l3prop.dtx
+++ b/macros/latex/contrib/l3kernel/l3prop.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3quark.dtx b/macros/latex/contrib/l3kernel/l3quark.dtx
index 25d382e2fd..772ffde63b 100644
--- a/macros/latex/contrib/l3kernel/l3quark.dtx
+++ b/macros/latex/contrib/l3kernel/l3quark.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3regex.dtx b/macros/latex/contrib/l3kernel/l3regex.dtx
index 6fbdb21eb8..b5eac07360 100644
--- a/macros/latex/contrib/l3kernel/l3regex.dtx
+++ b/macros/latex/contrib/l3kernel/l3regex.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3seq.dtx b/macros/latex/contrib/l3kernel/l3seq.dtx
index 44ce65943d..0f5f561655 100644
--- a/macros/latex/contrib/l3kernel/l3seq.dtx
+++ b/macros/latex/contrib/l3kernel/l3seq.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -1525,9 +1525,11 @@
           }
           {
             \group_begin:
-              \cs_set_eq:NN \@@_item:n \@@_shuffle_item:n
               \int_zero:N \l_@@_internal_a_int
+              \@@_push_item_def:
+              \cs_gset_eq:NN \@@_item:n \@@_shuffle_item:n
               #2
+              \@@_pop_item_def:
               \seq_gset_from_inline_x:Nnn \g_@@_internal_seq
                 { \int_step_function:nN { \l_@@_internal_a_int } }
                 { \tex_the:D \tex_toks:D ##1 }
diff --git a/macros/latex/contrib/l3kernel/l3skip.dtx b/macros/latex/contrib/l3kernel/l3skip.dtx
index 364ff13e32..32facf9bf0 100644
--- a/macros/latex/contrib/l3kernel/l3skip.dtx
+++ b/macros/latex/contrib/l3kernel/l3skip.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3sort.dtx b/macros/latex/contrib/l3kernel/l3sort.dtx
index d26ecdcf28..e6e254a57c 100644
--- a/macros/latex/contrib/l3kernel/l3sort.dtx
+++ b/macros/latex/contrib/l3kernel/l3sort.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3str-convert.dtx b/macros/latex/contrib/l3kernel/l3str-convert.dtx
index 37a647c9dc..ea0839abf0 100644
--- a/macros/latex/contrib/l3kernel/l3str-convert.dtx
+++ b/macros/latex/contrib/l3kernel/l3str-convert.dtx
@@ -1,7 +1,7 @@
 % \iffalse meta-comment
 %
 %% File: l3str-convert.dtx
-% 
+%
 % Copyright (C) 2013-2020 The LaTeX3 Project
 %
 % It may be distributed and/or modified under the conditions of the
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -68,7 +68,7 @@
 %   \item Bytes are translated to \TeX{} tokens through a given
 %     \enquote{escaping}. Those are defined for the most part by the
 %     \texttt{pdf} file format.  See Table~\ref{tab:escapings} for a
-%     list of escaping methods supported.\footnotemark
+%     list of escaping methods supported.\footnotemark[\csname c@footnote\endcsname]
 % \end{itemize}
 %
 % \begin{table}\centering
diff --git a/macros/latex/contrib/l3kernel/l3str.dtx b/macros/latex/contrib/l3kernel/l3str.dtx
index efb99050c5..af9fa9cd8b 100644
--- a/macros/latex/contrib/l3kernel/l3str.dtx
+++ b/macros/latex/contrib/l3kernel/l3str.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3styleguide.pdf b/macros/latex/contrib/l3kernel/l3styleguide.pdf
index 4b778f685e..885fc2a53c 100644
--- a/macros/latex/contrib/l3kernel/l3styleguide.pdf
+++ b/macros/latex/contrib/l3kernel/l3styleguide.pdf
diff --git a/macros/latex/contrib/l3kernel/l3styleguide.tex b/macros/latex/contrib/l3kernel/l3styleguide.tex
index 9617b99326..3da0760535 100644
--- a/macros/latex/contrib/l3kernel/l3styleguide.tex
+++ b/macros/latex/contrib/l3kernel/l3styleguide.tex
@@ -32,7 +32,7 @@ The released version of this bundle is available from CTAN.
         {latex-team@latex-project.org}%
     }%
 }
-\date{Released 2020-03-06}
+\date{Released 2020-04-06}
 
 \begin{document}
 
diff --git a/macros/latex/contrib/l3kernel/l3syntax-changes.pdf b/macros/latex/contrib/l3kernel/l3syntax-changes.pdf
index d6504320ca..ea1fcb7bfb 100644
--- a/macros/latex/contrib/l3kernel/l3syntax-changes.pdf
+++ b/macros/latex/contrib/l3kernel/l3syntax-changes.pdf
diff --git a/macros/latex/contrib/l3kernel/l3syntax-changes.tex b/macros/latex/contrib/l3kernel/l3syntax-changes.tex
index 4f8558eae4..2b28f611f9 100644
--- a/macros/latex/contrib/l3kernel/l3syntax-changes.tex
+++ b/macros/latex/contrib/l3kernel/l3syntax-changes.tex
@@ -32,7 +32,7 @@ The released version of this bundle is available from CTAN.
         {latex-team@latex-project.org}%
     }%
 }
-\date{Released 2020-03-06}
+\date{Released 2020-04-06}
 
 \newcommand{\TF}{\textit{(TF)}}
 
diff --git a/macros/latex/contrib/l3kernel/l3sys.dtx b/macros/latex/contrib/l3kernel/l3sys.dtx
index 382b2a5070..889e3f14fb 100644
--- a/macros/latex/contrib/l3kernel/l3sys.dtx
+++ b/macros/latex/contrib/l3kernel/l3sys.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3term-glossary.pdf b/macros/latex/contrib/l3kernel/l3term-glossary.pdf
index 5d1e3217c1..676371bcc3 100644
--- a/macros/latex/contrib/l3kernel/l3term-glossary.pdf
+++ b/macros/latex/contrib/l3kernel/l3term-glossary.pdf
diff --git a/macros/latex/contrib/l3kernel/l3term-glossary.tex b/macros/latex/contrib/l3kernel/l3term-glossary.tex
index a404d48695..2f044e01b6 100644
--- a/macros/latex/contrib/l3kernel/l3term-glossary.tex
+++ b/macros/latex/contrib/l3kernel/l3term-glossary.tex
@@ -32,7 +32,7 @@ The released version of this bundle is available from CTAN.
         {latex-team@latex-project.org}%
     }%
 }
-\date{Released 2020-03-06}
+\date{Released 2020-04-06}
 
 \newcommand{\TF}{\textit{(TF)}}
 
diff --git a/macros/latex/contrib/l3kernel/l3text-case.dtx b/macros/latex/contrib/l3kernel/l3text-case.dtx
index 44b06224b5..cb898633a7 100644
--- a/macros/latex/contrib/l3kernel/l3text-case.dtx
+++ b/macros/latex/contrib/l3kernel/l3text-case.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -65,6 +65,14 @@
 %
 % \subsection{Case changing}
 %
+% \begin{variable}{\l_text_titlecase_check_letter_bool}
+%   Needed to determine the route used in titlecasing.
+%    \begin{macrocode}
+\bool_new:N \l_text_titlecase_check_letter_bool
+\bool_set_true:N \l_text_titlecase_check_letter_bool
+%    \end{macrocode}
+% \end{variable}
+%
 % \begin{macro}[EXP]
 %   {
 %     \text_lowercase:n,
@@ -519,17 +527,21 @@
 %    \begin{macrocode}
 \cs_new:Npx \@@_change_case_char_title:nnN #1#2#3
   {
-    \bool_lazy_or:nnTF
-      { \sys_if_engine_luatex_p: }
-      { \sys_if_engine_xetex_p: }
-      { \exp_not:N \token_if_letter:NTF #3 }
+    \exp_not:N \bool_if:NTF \l_text_titlecase_check_letter_bool
       {
-        \exp_not:N \bool_lazy_or:nnTF
-          { \exp_not:N \token_if_letter_p:N #3 }
-          { \exp_not:N \token_if_active_p:N #3 }
+        \bool_lazy_or:nnTF
+          { \sys_if_engine_luatex_p: }
+          { \sys_if_engine_xetex_p: }
+          { \exp_not:N \token_if_letter:NTF #3 }
+          {
+            \exp_not:N \bool_lazy_or:nnTF
+              { \exp_not:N \token_if_letter_p:N #3 }
+              { \exp_not:N \token_if_active_p:N #3 }
+          }
+          { \exp_not:N \use:c { @@_change_case_char_ #1 :nN } }
+          { \exp_not:N \@@_change_case_char_title:nnnN { title } {#1} }
       }
       { \exp_not:N \use:c { @@_change_case_char_ #1 :nN } }
-      { \exp_not:N \@@_change_case_char_title:nnnN { title } {#1} }
         {#2} #3
   }
 \cs_new_eq:NN \@@_change_case_char_titleonly:nnN
diff --git a/macros/latex/contrib/l3kernel/l3text-purify.dtx b/macros/latex/contrib/l3kernel/l3text-purify.dtx
index fdddb25414..eda15bd643 100644
--- a/macros/latex/contrib/l3kernel/l3text-purify.dtx
+++ b/macros/latex/contrib/l3kernel/l3text-purify.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3text.dtx b/macros/latex/contrib/l3kernel/l3text.dtx
index 8d06641d95..b8d536b18a 100644
--- a/macros/latex/contrib/l3kernel/l3text.dtx
+++ b/macros/latex/contrib/l3kernel/l3text.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
@@ -178,6 +178,21 @@
 %       retains two separate letters, thus this transformation \emph{is}
 %       available using \pdfTeX{}.
 %   \end{itemize}
+%
+%  For titlecasing, note that there are two functions available. The
+%  function \cs{text_titlecase:n} applies (broadly) uppercasing to the first
+%  letter of the input, then lowercasing to the remainder. In contrast,
+%  \cs{text_titlecase_first:n} \emph{only} carries out the uppercasing operation,
+%  and leaves the balance of the input unchanged. Determining whether
+%  non-letter characters at the start of text should switch from upper- to
+%  lowercasing is controllable. When \cs{l_text_titlecase_check_letter_bool} is
+%  \texttt{true}, characters which are not letters (category code~$11$) are
+%  left unchanged and \enquote{skipped}: the first \emph{letter} is uppercased.
+%  (With $8$-bit engines, this is extended to active characters which form
+%  part of a multi-byte letter codepoint.) When
+%  \cs{l_text_titlecase_check_letter_bool} is \texttt{false}, the first
+%  character is uppercased, and the rest lowercased, irrespective of the nature
+%  of the character.
 % \end{function}
 %
 % \subsection{Removing formatting from text}
@@ -234,10 +249,20 @@
 %   content \emph{may} be excluded from processing.
 % \end{variable}
 %
+% \begin{variable}{\l_text_case_exclude_arg_tl}
+%   Lists commands which are excluded from case changing.
+% \end{variable}
+%
 % \begin{variable}{\l_text_expand_exclude_tl}
 %   Lists commands which are excluded from expansion.
 % \end{variable}
 %
+% \begin{variable}{\l_text_titlecase_check_letter_bool}
+%   Controls how the start of titlecasing is handled: when \texttt{true}, the
+%   first \emph{letter} in text is considered. The standard setting is
+%   \texttt{true}.
+% \end{variable}
+%
 % \end{documentation}
 %
 % \begin{implementation}
diff --git a/macros/latex/contrib/l3kernel/l3tl-analysis.dtx b/macros/latex/contrib/l3kernel/l3tl-analysis.dtx
index bdfc80f714..0ae289273f 100644
--- a/macros/latex/contrib/l3kernel/l3tl-analysis.dtx
+++ b/macros/latex/contrib/l3kernel/l3tl-analysis.dtx
@@ -44,7 +44,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3tl.dtx b/macros/latex/contrib/l3kernel/l3tl.dtx
index 3fba28f01d..f12430ba38 100644
--- a/macros/latex/contrib/l3kernel/l3tl.dtx
+++ b/macros/latex/contrib/l3kernel/l3tl.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3token.dtx b/macros/latex/contrib/l3kernel/l3token.dtx
index 2c7dac3898..ba8e7a7d9c 100644
--- a/macros/latex/contrib/l3kernel/l3token.dtx
+++ b/macros/latex/contrib/l3kernel/l3token.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/l3unicode.dtx b/macros/latex/contrib/l3kernel/l3unicode.dtx
index 90dd9057b4..5f001aa2c0 100644
--- a/macros/latex/contrib/l3kernel/l3unicode.dtx
+++ b/macros/latex/contrib/l3kernel/l3unicode.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2020-03-06}
+% \date{Released 2020-04-06}
 %
 % \maketitle
 %
diff --git a/macros/latex/contrib/l3kernel/source3.pdf b/macros/latex/contrib/l3kernel/source3.pdf
index 57b8a07a47..bc72b54e52 100644
--- a/macros/latex/contrib/l3kernel/source3.pdf
+++ b/macros/latex/contrib/l3kernel/source3.pdf
diff --git a/macros/latex/contrib/l3kernel/source3.tex b/macros/latex/contrib/l3kernel/source3.tex
index 33e5430010..af8f98fc94 100644
--- a/macros/latex/contrib/l3kernel/source3.tex
+++ b/macros/latex/contrib/l3kernel/source3.tex
@@ -53,7 +53,7 @@ for those people who are interested.
          {latex-team@latex-project.org}%
    }%
 }
-\date{Released 2020-03-06}
+\date{Released 2020-04-06}
 
 \pagenumbering{roman}
 \maketitle