address review comments

Author: davisjam

lib/marked.js

@@ -564,36 +564,57 @@ inline.pedantic = merge({}, inline.normal, {
         .replace('label', inline._label)
         .getRegex();
 
-      function unwrapAngleBrackets (str) {
-        if (str.match(/^<.*>$/)) {
-          str = str.slice(1, -1);
+      // destination: DESTINATION from generalLinkRe
+      // returns [destination, title]: no angle-brackets on destination, no quotes on title
+      function splitIntoDestinationAndTitle (destination) {
+        function unwrapAngleBrackets (str) {
+          if (str.match(/^<.*>$/)) {
+            str = str.slice(1, -1);
+          }
+          return str;
+        }
+
+        // Valid DESTINATIONs, in decreasing specificity.
+        var destinationAndTitleRe = /^([^'"(]*[^\s])\s+(['"(].*['")])/;
+        var destinationRe = /^(<?[\s\S]*>?)/;
+        var parsingRegexes = [destinationAndTitleRe, destinationRe];
+
+        var match = false;
+        var dest = undefined;
+        var title = undefined;
+        for (var i = 0; i < parsingRegexes.length; i++) {
+          match = parsingRegexes[i].exec(destination);
+          if (match) {
+            dest = match[1];
+            title = match[2];
+            break;
+          }
+        }
+
+        if (match) {
+          // title is optional.
+          if (typeof title === 'undefined') {
+            title = '';
+          }
+
+          // Format dest.
+          dest = dest.trim();
+          dest = unwrapAngleBrackets(dest);
+
+          return [dest, title];
         }
-        return str;
+        return null;
       }
 
       var fullMatch = generalLinkRe.exec(s);
       if (fullMatch) {
         var text = fullMatch[1];
         var destination = fullMatch[2];
 
-        var m;
-
-        var destinationAndTitleRe = /^([^'"(]*[^\s])\s+(['"(].*['")])/;
-        if (m = destinationAndTitleRe.exec(destination)) {
-          // <destination> -> destination
-          var dest1 = m[1].trim();
-          dest1 = unwrapAngleBrackets(dest1);
-          var title1 = m[2];
-          return [fullMatch[0], text, dest1, title1];
-        }
-
-        var destinationRe = /^(<?[\s\S]*>?)/;
-        if (m = destinationRe.exec(destination)) {
-          // <destination> -> destination
-          var dest2 = m[1].trim();
-          dest2 = unwrapAngleBrackets(dest2);
-          var title2 = '';
-          return [fullMatch[0], text, dest2, title2];
+        // Does 'destination' match spec?
+        var destinationAndTitle = splitIntoDestinationAndTitle(destination);
+        if (destinationAndTitle) {
+          return [fullMatch[0], text, destinationAndTitle[0], destinationAndTitle[1]];
         }
       }
       return null;