Refs: #6890
The comma character is not TeX-escaped because it is frequent in general
text and escaping it would make the LaTeX output larger for only dealing
with the problem of the LaTeX-ligature of ,, into a single character.
And one there is problem with the commas in options to Verbatim from
PygmentsBridge.
The hyphen character is escaped (not in ids and URIs!) to
\sphinxhyphen{} for both Unicode and non-Unicode engines. This is needed
to work around hyperref transforming -- and --- from section titles into
EN DASH resp. EM DASH in PDF bookmarks.
https://github.com/latex3/hyperref/issues/112
Note to expert LaTeX users: if Sphinx latex user with xelatex has
- turned off Smart Quotes for some reason,
- but does want TeX ligatures and thus overrode Sphinx
latex_elements['fontenc'] default (since #6888) to this effect,
then this should be added to LaTeX preamble:
\def\sphinxhyphen#1{-}% (\protected is now not needed)
\let\sphinxhyphenforbookmarks\sphinxhyphen