test_require.rb: rename

* test/ruby/test_require.rb (test_load_scope): rename and add
  failure message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48185 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
load.c: transcode path

* load.c (rb_f_load): path name needs to be transcoded to OS path
  encoding.  [ruby-list:49994]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e