[Bf-docboard] Visual Improvements to the Manual

[Campbell Barton]

> Another thing which annoys me is the way search result captions show
> extraneous markup, which usually makes them completely useless..
> Most likely not solvable with css, but I thought I'd mention it.
> Screenshot: http://pasteall.org/pic/show.php?id=85829

This is a known issue, https://github.com/sphinx-doc/sphinx/issues/1618

Though I think its a stretch to suggest it makes search useless.