Autolinks
Without more changes, autolinks could either support info strings or spaces in absolute URLs, but not both.
Assuming we preferred info strings, should they be dropped from, retained for or even used as the link text?
<http://foo.bar/baz info string>
<p><a href="http://foo.bar/baz">http://foo.bar/baz</a></p>
<p><a href="http://foo.bar/baz">http://foo.bar/baz info string</a></p>
<p><a href="http://foo.bar/baz">info string</a></p>