Revert removal of compare nesting

Since we want the user to be able to pass a negative comparison function, the extra layer of wrapping is now needed

src/core/matchers/toHaveBeenCalled.js

@@ -1,24 +1,26 @@
 getJasmineRequireObj().toHaveBeenCalled = function(j$) {
 
   function toHaveBeenCalled() {
-    return function(actual) {
-      var result = {};
+    return {
+      compare: function(actual) {
+        var result = {};
 
-      if (!j$.isSpy(actual)) {
-        throw new Error('Expected a spy, but got ' + j$.pp(actual) + '.');
+        if (!j$.isSpy(actual)) {
+          throw new Error('Expected a spy, but got ' + j$.pp(actual) + '.');
+        }
+
+        if (arguments.length > 1) {
+          throw new Error('toHaveBeenCalled does not take arguments, use toHaveBeenCalledWith');
+        }
+
+        result.pass = actual.calls.any();
+
+        result.message = result.pass ?
+          "Expected spy " + actual.and.identity() + " not to have been called." :
+          "Expected spy " + actual.and.identity() + " to have been called.";
+
+        return result;
       }
-
-      if (arguments.length > 1) {
-        throw new Error('toHaveBeenCalled does not take arguments, use toHaveBeenCalledWith');
-      }
-
-      result.pass = actual.calls.any();
-
-      result.message = result.pass ?
-        "Expected spy " + actual.and.identity() + " not to have been called." :
-        "Expected spy " + actual.and.identity() + " to have been called.";
-
-      return result;
     };
   }