* These were added by the RST reader and, for literate Haskell,
by the Markdown and LaTeX readers. There is no point to
this class, and it is not applied consistently by all readers.
See #5047.
* Reverse order of `literate` and `haskell` classes on code blocks
when parsing literate Haskell. Better if `haskell` comes first.
* Use a Span with class "title-reference" for the default
title-reference role.
* Use B.text to split up contents into Spaces, SoftBreaks, and Strs
for title-reference.
* Use Code with class "interpreted-text" instead of Span and Str for
unknown roles. (The RST writer has also been modified to round-trip
this properly.)
* Disallow blank lines in interpreted text.
* Backslash-escape now works in interpreted text.
* Backticks followed by alphanumerics no longer end interpreted text.
Closes#4811.
