test_file_exhaustive.rb: others home

* test/ruby/test_file_exhaustive.rb (test_expand_path_home_dir_string):
  add assertions for other user's home directory path.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e