Fix shifty legacy mode

Author: papandreou

lib/createTopLevelExpect.js

@@ -1842,11 +1842,11 @@ expectPrototype._callInNestedContext = function (callback) {
   }
 };
 
-expectPrototype.shifty = function (subject, args, rest) {
+expectPrototype.shifty = function (subject, args, rest, legacyMode) {
   this._assertWrappedExpect();
 
   const nextArgumentType = this.findTypeOf(rest[0]);
-  if (arguments.length > 1) {
+  if (legacyMode) {
     // Legacy
     this.argsOutput = (output) => {
       args.forEach((arg, index) => {
@@ -1912,7 +1912,7 @@ expectPrototype.shift = function (subject, assertionIndex) {
   if (assertionIndex !== -1) {
     const args = this.args.slice(0, assertionIndex);
     const rest = this.args.slice(assertionIndex);
-    return this.shifty(subject, args, rest);
+    return this.shifty(subject, args, rest, arguments.length > 1);
   } else {
     // No assertion to delegate to. Provide the new subject as the fulfillment value:
     return subject;