Fixed numerous XHTML problems that caused validation errors and warnings.
Link elements for Atom and RSS feeds had no end tag. <div> block element
inside <a> in-line element isn't right and caused rendering problems on
Safari. Spurious </div> tag in search forms. Branch entry missing closing
</a> tag.
# should print nothing
# should fail
abort: path 'b/x' is inside repo 'b'
abort: path 'b/x' is inside repo 'b'
# should fail
abort: path 'b/x' is inside repo 'b'
# should arguably print nothing
# should fail
abort: path 'b/a' is inside repo 'b'