From bcdf6c829c6761de02484473ebe43fa3760adcaa Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Wed, 12 May 2021 03:01:15 +0000
Subject: CTAN sync 202105120301

---
 macros/latex/contrib/l3kernel/l3token.dtx | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'macros/latex/contrib/l3kernel/l3token.dtx')

diff --git a/macros/latex/contrib/l3kernel/l3token.dtx b/macros/latex/contrib/l3kernel/l3token.dtx
index 3db1f706c8..ce65d87061 100644
--- a/macros/latex/contrib/l3kernel/l3token.dtx
+++ b/macros/latex/contrib/l3kernel/l3token.dtx
@@ -43,7 +43,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2021-05-07}
+% \date{Released 2021-05-11}
 %
 % \maketitle
 %
@@ -1080,6 +1080,15 @@
 %     \cs{peek_regex:nTF} as control sequences, while functions that
 %     inspect individual tokens (for instance \cs{peek_charcode:NTF})
 %     only take into account their meaning.
+%
+%     The \cs{peek_regex:nTF} function only inspects as few tokens as
+%     necessary to determine whether the regular expression matches.
+%     For instance \cs{peek_regex:nTF} \verb"{ abc | [a-z] }" |{ } { }|
+%     |abc| will only inspect the first token~|a| even though the first
+%     branch |abc| of the alternative is preferred in functions such as
+%     \cs{peek_regex_remove_once:n}.  This may have an effect on
+%     tokenization if the input stream has not yet been tokenized and
+%     category codes are changed.
 %   \end{texnote}
 % \end{function}
 %
-- 
cgit v1.2.3

