keyword bolded in search results?

If you look at the below URL at the search results, I actually have 2
questions about what you see.

http://www.cgirb.com/cgi-bin/search.cgi?cmd=Search%21&q=subjects

1.  Which setting is it in the search.htm template which is allowing
me to get text content around the keyword so you can see context of
the keyword before you click a search result link?

2.  Is there a way to bold the keyword in that subset of context like
it bolds itself in the URL by title (note the first 2 results).

thanks,
David