Created attachment 168609 [details] [review]
patch for the problem.

I have a problem Assistant shows a blank page for some keywords,
such as "g_str_hash" or "g_array_free".

`devhelp -a g_str_hash` should reproduce this bug.
Other affected functions include: "g_timer_destroy" "g_ptr_array_foreach"

The current implementation of Assistant tries to extract part of 
the *.html file, by searching for "<pre class=\"programlisting" 
and "<div class=\"refsect". The problem is, there are no "<div class=\"refsect"s 
for functions documented at the bottom of the *.html files.

Attached a small patch as a workaround. This patch tries to search 
for "<div class=\"footer" if there is no corresponding "<div class=\"refsect".

This workaround works, but will result in 3 unmatched "</div>" 
tags to be printed in the generated html code. I think this can be removed by 
repeating g_strrstr 3 times, if really needed.

I Hope this helps.