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-rw-r--r--macros/latex/contrib/l3kernel/l3token.dtx12
1 files changed, 10 insertions, 2 deletions
diff --git a/macros/latex/contrib/l3kernel/l3token.dtx b/macros/latex/contrib/l3kernel/l3token.dtx
index 6b1b1759ff..0fb548d483 100644
--- a/macros/latex/contrib/l3kernel/l3token.dtx
+++ b/macros/latex/contrib/l3kernel/l3token.dtx
@@ -43,7 +43,7 @@
% }^^A
% }
%
-% \date{Released 2022-04-20}
+% \date{Released 2022-04-29}
%
% \maketitle
%
@@ -1975,7 +1975,15 @@
{ \cs_if_exist_p:N \tex_XeTeXversion:D }
{
\cs_set:Npn \@@_str_change_case:nN #1#2
- { \tl_to_str:n {#2} }
+ {
+ \int_compare:nNnTF {#1} = 0
+ { \tl_to_str:n {#2} }
+ {
+ \int_compare:nTF { `A <= #1 <= `z }
+ { \char_generate:nn {#1} { 12 } }
+ { \tl_to_str:n {#2} }
+ }
+ }
}
% \end{macrocode}
% \end{macro}