autolink not parsed if em-dash is right after it

[ousia]

<https: www.link.com>—

gives the following HTML output:

<p><https://www.link.com>—</p>

This seems to be caused by having the Unicode character right after the autolink. The XML decimal entity (—) is not problematic.

Tested with both pandoc-1.13.1 for Fedora 20 and http://johnmacfarlane.net/pandoc/try/.