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-rw-r--r--Master/texmf-dist/tex/optex/base/math-macros.opm5
1 files changed, 4 insertions, 1 deletions
diff --git a/Master/texmf-dist/tex/optex/base/math-macros.opm b/Master/texmf-dist/tex/optex/base/math-macros.opm
index 00adc9f1aaf..fa4317f25ae 100644
--- a/Master/texmf-dist/tex/optex/base/math-macros.opm
+++ b/Master/texmf-dist/tex/optex/base/math-macros.opm
@@ -347,7 +347,10 @@
names from plain\TeX/ with `@` character are re-written in a more readable
form.\nl
\`\sp` is an alternative for `^`. The \`\sb` alternative for `_` was defined
- at line 27 of the file `math-macros.opm`.
+ at line 27 of the file `math-macros.opm`.\nl
+ \`\_thinsk`, \`\_medsk`, \`\_thicksk` and \`\_thinneg` should be used
+ instead `\,`, `\>`, `\;` and `\!` in macros because a user can re-define
+ these single-letter sequences.
\_cod -----------------------------
\_let\_sp=^ \public \sp ;