fix($http): default json transformation should not crash on angular template

The way we determine whether it's json is lame anyway. We need to change that.
We should probably check the content type header...

Author: vojtajina

src/service/http.js

@@ -61,7 +61,7 @@ function transform(data, fns, param) {
  * @description
  */
 function $HttpProvider() {
-  var JSON_START = /^\s*[\[\{]/,
+  var JSON_START = /^\s*(\[|\{[^\{])/,
       JSON_END = /[\}\]]\s*$/,
       PROTECTION_PREFIX = /^\)\]\}',?\n/;
 

test/service/httpSpec.js

@@ -758,6 +758,16 @@ describe('$http', function() {
           expect(callback).toHaveBeenCalledOnce();
           expect(callback.mostRecentCall.args[0]).toEqual([1, 'abc', {foo:'bar'}]);
         });
+
+
+        it('should not deserialize tpl beginning with ng expression', function() {
+          $httpBackend.expect('GET', '/url').respond('{{some}}');
+          $http.get('/url').on('200', callback);
+          $httpBackend.flush();
+
+          expect(callback).toHaveBeenCalledOnce();
+          expect(callback.mostRecentCall.args[0]).toEqual('{{some}}');
+        });
       });