Don't prohibit expect.outputFormat() without a parameter on a nested expect

#784 (comment)

Author: papandreou

lib/createTopLevelExpect.js

@@ -1627,10 +1627,10 @@ expectPrototype.freeze = function () {
 };
 
 expectPrototype.outputFormat = function (format) {
-  this._assertTopLevelExpect();
   if (typeof format === 'undefined') {
     return this._outputFormat;
   } else {
+    this._assertTopLevelExpect();
     this._outputFormat = format;
     return this;
   }