Remove thisArg from _.spread. [closes #957]

lodash.src.js

@@ -7643,15 +7643,14 @@
     }
 
     /**
-     * Creates a function that invokes `func` with the `this` binding of `thisArg`
-     * and the array of arguments provided to the created function much like
-     * [Function#apply](http://es5.github.io/#x15.3.4.3).
+     * Creates a function that invokes `func` with the `this` binding of the
+     * created function and the array of arguments provided to the created
+     * function much like [Function#apply](http://es5.github.io/#x15.3.4.3).
      *
      * @static
      * @memberOf _
      * @category Function
      * @param {Function} The function to spread arguments over.
-     * @param {*} [thisArg] The `this` binding of `func`.
      * @returns {*} Returns the new function.
      * @example
      *
@@ -7680,7 +7679,7 @@
         throw new TypeError(FUNC_ERROR_TEXT);
       }
       return function(array) {
-        return func.apply(thisArg, array);
+        return func.apply(this, array);
       };
     }
 

test/test.js

@@ -12446,10 +12446,6 @@
   QUnit.module('lodash.spread');
 
   (function() {
-    function add(x, y) {
-      return x + y;
-    }
-
     test('should spread arguments to `func`', 1, function() {
       var spread = _.spread(add);
       strictEqual(spread([4, 2]), 6);
@@ -12470,12 +12466,13 @@
       deepEqual(args, [4, 2]);
     });
 
-    test('should support the `thisArg` argument', 1, function() {
+    test('should not set a `this` binding', 1, function() {
       var spread = _.spread(function(x, y) {
         return this[x] + this[y];
-      }, [4, 2]);
+      });
 
-      strictEqual(spread([0, 1]), 6);
+      var object = { 'spread': spread, 'x': 4, 'y': 2 };
+      strictEqual(object.spread(['x', 'y']), 6);
     });
   }());