Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/rubyspec/library/win32ole/win32ole_param/retval_spec.rb

@@ -0,0 +1,21 @@
+platform_is :windows do
+  require 'win32ole'
+
+  describe "WIN32OLE_PARAM#retval?" do
+    before :each do
+      ole_type_detail = WIN32OLE_TYPE.new("Microsoft Scripting Runtime", "FileSystemObject")
+      m_copyfile = WIN32OLE_METHOD.new(ole_type_detail, "CopyFile")
+      @param_overwritefiles = m_copyfile.params[2]
+    end
+
+    it "raises ArgumentError if argument is given" do
+      lambda { @param_overwritefiles.retval?(1) }.should raise_error ArgumentError
+    end
+
+    it "returns false for 3rd parameter of FileSystemObject's 'CopyFile' method" do
+      @param_overwritefiles.retval?.should be_false
+    end
+
+  end
+
+end