* lib/find.rb (Find.find): respect the encodings of arguments.
  [ruby-dev:47530] [Feature #8657]

* test/test_find.rb: add tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42866 b2dd03c8-39d4-4d8f-98ff-823fe69b080e