Sync test_refinements.rb with original file

Author: ssnickolay

test/mri/excludes/TestRefinement.rb

@@ -1,7 +1,6 @@
 exclude :test_eval_with_binding_scoping, "needs investigation"
 exclude :test_include_refinement, "needs investigation"
 exclude :test_prepend_after_refine, "needs investigation"
-exclude :test_refine_module, "needs investigation"
 exclude :test_refine_prepended_class, "needs investigation"
 exclude :test_refine_with_proc, "needs investigation"
 exclude :test_respond_to_should_use_refinements, "needs investigation"

test/mri/tests/ruby/test_refinement.rb

@@ -406,20 +406,19 @@ def baz
     end
 
     module M2
-      # TODO CS 21-Feb-19 can we run this now?
-      #refine M do
-      #  def foo
-      #    "M@M2#foo"
-      #  end
-      #
-      #  def bar
-      #    "#{super} M@M2#bar"
-      #  end
-      #
-      #  def baz
-      #    "#{super} M@M2#baz"
-      #  end
-      #end
+      refine M do
+        def foo
+          "M@M2#foo"
+        end
+
+        def bar
+          "#{super} M@M2#bar"
+        end
+
+        def baz
+          "#{super} M@M2#baz"
+        end
+      end
     end
 
     using M2