refactor(ngMock window.inject test): mark regression test for issue angular#13591

Author: jurko-gospodnetic

test/ngMock/angular-mocksSpec.js

@@ -974,6 +974,7 @@ describe('ngMock', function() {
             var throwingInjectingCall = testInjectCaller();
             throwingInjectingCall.setThrow(true);
 
+            // regression test for issue #13591 when run on IE10+ or PhantomJS
             it('should update thrown Error stack with inject call location', function() {
               try {
                 throwingInjectingCall();