expand list of chars considered in an email address for auto-hyperlink-quoting.

It's still not the full list (see RFC2822, 3.4.1), but unless you want
to go down the "dealing with quoted whitespace" path, this is probably
good enough.

Author: Anthony Baxter

roundup/cgi/templating.py

@@ -836,7 +836,7 @@ def __cmp__(self, other):
 
 class StringHTMLProperty(HTMLProperty):
     hyper_re = re.compile(r'((?P<url>\w{3,6}://\S+)|'
-                          r'(?P<email>[\w\.]+@[\w\.\-]+)|'
+                          r'(?P<email>[-+=%/;\w\.]+@[\w\.\-]+)|'
                           r'(?P<item>(?P<class>[a-z_]+)(?P<id>\d+)))')
     def _hyper_repl(self, match):
         if match.group('url'):