Turn back on the 'Issue: ' text stripping.
Merge branch 'master' of github.com:tabatkins/bikeshed
Reduce the text of markdown single-line headings a bit.
Make simplifyText() normalize whitespace.
Fold multiple whitespace characters inside <dfn> to a single space.

Currently, `<dfn>new\n   term</dfn>` does not match `<a>new term</a>`.
This patch normalizes whitespace inside definition link text in the
hopes of fixing exactly that problem.