Fix jslint issues

src/core/asymmetric_equality/Anything.js

@@ -7,7 +7,7 @@ getJasmineRequireObj().Anything = function(j$) {
   };
 
   Anything.prototype.jasmineToString = function() {
-    return "<jasmine.anything>";
+    return '<jasmine.anything>';
   };
 
   return Anything;

src/core/asymmetric_equality/StringMatching.js

@@ -13,7 +13,7 @@ getJasmineRequireObj().StringMatching = function(j$) {
   };
 
   StringMatching.prototype.jasmineToString = function() {
-    return "<jasmine.stringMatching(" + this.regexp + ")>";
+    return '<jasmine.stringMatching(' + this.regexp + ')>';
   };
 
   return StringMatching;