Handle string comparisons correctly with equals_

src/base.js

@@ -92,6 +92,16 @@ jasmine.isArray_ = function(value) {
   return Object.prototype.toString.apply(value) === '[object Array]';
 };
 
+/**
+ * @ignore
+ * @private
+ * @param value
+ * @returns {Boolean}
+ */
+jasmine.isString_ = function(value) {
+  return Object.prototype.toString.apply(value) === '[object String]';
+};
+
 /**
  * Pretty printer for expecations.  Takes any object and turns it into a human-readable string.
  *