Sphinx highlighting

[Charles Hixson]

What controls the yellow highlight bar that Sphinx sometimes puts in the 
documentation?
E.g.:
.. py:function:: basic_parseStrTest ()
generates bold-face text, where
.. py:function:: basicParseStrTest ()
generates text with a yellow bar highlight.

I actually rather like the yellow bar highlight, but I can't stand 
having it appear for some of my functions, and not for others, and I 
haven't been able to figure out what turns it on or off.

-- 
Charles Hixson