Added addional tests for missing -/_ and clarified deleted gem tests
Added addional tests for missing -/_ and clarified deleted gem tests

sonalkr132/rubygems.org,rubygems/rubygems.org,rubygems/rubygems.org,sonalkr132/rubygems.org,sonalkr132/rubygems.org,rubygems/rubygems.org,sonalkr132/rubygems.org,rubygems/rubygems.org