Merge pull request #479 from socrates77/plugin-route-fix

Author: kadamwhite

lib/util/named-group-regexp.js

@@ -14,7 +14,7 @@ const pattern = [
 '[>\']',
 // Get everything up to the end of the capture group: this is the RegExp used
 // when matching URLs to this route, which we can use for validation purposes.
-'([^\\)]*)',
+'([^\\)]*(\\))?)\\??',
 // Capture group end
 '\\)',
 ].join( '' );