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bug#48365: 13.0.11; Dollars in distinct comments trigger math mode highl

From: Tassilo Horn
Subject: bug#48365: 13.0.11; Dollars in distinct comments trigger math mode highlighting in text in-between
Date: Tue, 11 May 2021 22:33:04 +0200
User-agent: mu4e 1.5.13; emacs 28.0.50

> Sadly, I now have another problem. Consider this:
> \def\XINT:NE:f:noeval:from:braced:u:p #1#2%
>     {\detokenize{\romannumeral`$XINT_expr_null\expandafter#1}~expanded{{#2}}}%
> There is $ in there, and it triggers math mode highlighting which is a
> priori fine, I can live with that *if I can constrain it to not extend
> beyond that line*
> In the past I would control it this way:
> \def\XINT:NE:f:noeval:from:braced:u:p #1#2%
> {\detokenize{\romannumeral`$XINT_expr_null\expandafter#1}~expanded{{#2}}}%$
> (observe the added $ at end of second line after the % comment character)
> With your patch the %$ does not stop the math highlighting !

Now that you've mentioned it, I remember I wanted to do that change also
in the past and Keita-san stopped me from doing so for exactly this

I've pushed another commit which ignores $ in comments with the single
exception of the "% $ \n" workaround, i.e., a comment with just a $,
arbitrary spaces/tabs before or after the $, and then the end of the

I'm not sure what is worse.  The restriction to have at least balanced $
also in comments, or the now very restrictive workaround form.  We'll
see if someone complains because that breaks his

  % Workaround fix $.

comment fixes.


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