clear expectation_ordering rather than creating a new one for each ex…

…ample

lib/rspec/mocks/order_group.rb

@@ -22,11 +22,19 @@ def consume
       end
 
       # @private
-      def handle_order_constraint expectation
-        return unless @ordering.include? expectation
+      def handle_order_constraint(expectation)
+        return unless @ordering.include?(expectation)
         return consume if ready_for?(expectation)
         expectation.raise_out_of_order_error
       end
+
+      def clear
+        @ordering.clear
+      end
+
+      def empty?
+        @ordering.empty?
+      end
     end
   end
 end

lib/rspec/mocks/space.rb

@@ -17,7 +17,7 @@ def reset_all
           mock.rspec_reset
         end
         mocks.clear
-        @expectation_ordering = nil
+        expectation_ordering.clear
       end
 
       def expectation_ordering

spec/rspec/mocks/mock_space_spec.rb

@@ -43,9 +43,8 @@ def reset?
         @space.instance_eval { mocks.empty? }.should be_true
       end
       it "resets the ordering" do
-        OrderGroup.should_receive(:new)
         @space.reset_all
-        @space.expectation_ordering
+        @space.expectation_ordering.should be_empty
       end
       it "only adds an instance once" do
         @space.add(m1 = double("mock1"))