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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