Ruby

• test/rdoc/test_rdoc_rubygems_hook.rb
  (TestRDocRubygemsHook#test_setup_unwritable): 1. check the existance
  of the file(directory) before touch it. 2. remove test
  file(directory) after the test. see [ruby-core:50388].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38077 b2dd03c8-39d4-4d8f-98ff-823fe69b080e