[rubygems/rubygems] Use assert_path_exist and assert_path_not_exist instead of assert_path_exists and refute_path_exists
https://github.com/rubygems/rubygems/commit/a7c93558c3
[rubygems/rubygems] Use assert_path_exist and assert_path_not_exist instead of assert_path_exists and refute_path_exists
https://github.com/rubygems/rubygems/commit/a7c93558c3