Avoid calling Kernel#format from ObjectMethods#mocha_inspect

lib/mocha/inspect.rb

@@ -5,7 +5,7 @@ module ObjectMethods
     def mocha_inspect
       address = __id__ * 2
       address += 0x100000000 if address < 0
-      inspect =~ /#</ ? "#<#{self.class}:0x#{format('%x', address)}>" : inspect
+      inspect =~ /#</ ? "#<#{self.class}:0x#{Kernel.format('%x', address)}>" : inspect
     end
   end
 

test/unit/object_inspect_test.rb

@@ -45,4 +45,14 @@ def test_should_use_underscored_id_instead_of_object_id_or_id_so_that_they_can_b
 
     assert_equal [:__id__], calls.uniq
   end
+
+  def test_should_not_call_object_instance_format_method
+    object = Object.new
+    class << object
+      def format(*)
+        'internal_format'
+      end
+    end
+    assert_no_match(/internal_format/, object.mocha_inspect)
+  end
 end