org-html-text-markup-alist

org-html-text-markup-alist is a variable defined in `ox-html.el'.
Its value is

((bold . "%s")
 (code . "%s")
 (italic . "%s")
 (strike-through . "%s")
 (underline . "%s")
 (verbatim . "%s"))

Documentation:
Alist of HTML expressions to convert text markup.

The key must be a symbol among `bold', `code', `italic',
`strike-through', `underline' and `verbatim'. The value is
a formatting string to wrap fontified text with.

If no association can be found for a given markup, text will be
returned as-is.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.