Re-write test body to match test description

test/language/statements/with/12.10.1-14-s.js

@@ -17,7 +17,7 @@ function testcase() {
         "use strict";
 
         try {
-            eval("var obj = { get: function (a) { with(a){} } }; ");
+            eval("var obj = { get(a) { with(a){} } }; ");
 
             return false;
         } catch (e) {