fix(parser): change regex to throw exception when incorrect format

Author: dimirc

src/select.js

@@ -55,7 +55,7 @@
      */
     self.parse = function(expression) {
 
-      var match = expression.match(/^\s*(?:([\s\S]+?)\s+as\s+)?([\s\S]+?)\s+in\s+([\s\S]+?)(?:\s+track\s+by\s+([\s\S]+?))?\s*$/);
+      var match = expression.match(/^\s*(?:([\s\S]+?)\s+as\s+)?([\S]+?)\s+in\s+([\s\S]+?)(?:\s+track\s+by\s+([\s\S]+?))?\s*$/);
 
       if (!match) {
         throw uiSelectMinErr('iexp', "Expected expression in form of '_item_ in _collection_[ track by _id_]' but got '{0}'.",