[rubygems/rubygems] Use TestCase#util_spec instead of custom code.
https://github.com/rubygems/rubygems/commit/74d485ff1e
[rubygems/rubygems] Use TestCase#util_spec instead of custom code.
https://github.com/rubygems/rubygems/commit/74d485ff1e