* object.c (rb_mod_to_s): Module#{to_s,inspect}, when invoked on

a refinement, returns a string in the format #<refinement:C@M>,
  where C is a refined class and M is a module at which the refinemet
  is defined.

* eval.c (rb_mod_refine): store information on a refinement for the
  above change.

* test/ruby/test_refinement.rb: related test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37424 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_refinement.rb

@@ -622,4 +622,28 @@ class TestRefinement < Test::Unit::TestCase
   def test_symbol_to_proc
     assert_equal("foo", SymbolToProc::M.call_foo)
   end
+
+  module Inspect
+    module M
+      refine Fixnum do
+      end
+    end
+  end
+
+  def test_inspect
+    assert_equal("#<refinement:Fixnum@TestRefinement::Inspect::M>",
+                 Inspect::M.refinements[Fixnum].inspect)
+
+    c = Class.new
+    m = Module.new {
+      refine String do
+      end
+      refine c do
+      end
+    }
+    assert_equal("#<refinement:String@#{m.inspect}>",
+                 m.refinements[String].inspect)
+    assert_equal("#<refinement:#{c.inspect}@#{m.inspect}>",
+                 m.refinements[c].inspect)
+  end
 end