Use <i> and <b> for '' and ''' instead of <em> and <strong>. There's no

Use <i> and <b> for '' and ''' instead of <em> and <strong>. There's no
good reason to use <em> and <strong> here; they increase cache storage
and bandwidth requirements ;) and may be abusing semantic markup.

* Bug 369: '' should be interpreted as <i>, not <em>
http://bugzilla.wikipedia.org/show_bug.cgi?id=369
* Bug 370: ''' should be interpreted as <b>, not <strong>
http://bugzilla.wikipedia.org/show_bug.cgi?id=370