The following document shows a situation where one cannot continue typing in a
formula but are sent out to text mode.
<TeXmacs|1.0.5.7>
<style|generic>
<\body>
Getting out of the subindex when the formula is hyphenated gets you out of
the formula, eg <with|mode|math|<big|sum><big|.>t<rsub|\<mu\>>>
But the subindex must be the last thing of the line, which is normally the
case when writing for the first time the formula. If you add a character in
text after the <with|mode|math|\<mu\>>, the bug is no longer present.
Grouping (<verbatim|M-R>) the formula, which prevents hyphenation, also
solves the problem.
Try the same example here <with|mode|math|<big|sum>t<rsub|\<mu\>><big|.>>.
It gets out correctly, even if the <with|mode|math|\<mu\>> is the last
character.
Now that I have your attention, a question: I have remarked that
<hlink|long descriptive text in links, or urls|here irrelevant> don't
hyphenate. Why is this so? This could be handled the same way the user is
left the decision whether to group (<verbatim|M-R>) an inline formula to
prevent hyphenation.
\;
\;
</body>
<\initial>
<\collection>
<associate|language|british>
</collection>
</initial>
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