test_range.rb: add tests to improve coverage
This patch will improve the result of line coverage from 91.3% to 95.0%. [Fix GH-1899]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63750 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_range.rb: add tests to improve coverage
This patch will improve the result of line coverage from 91.3% to 95.0%.
[Fix GH-1899]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63750 b2dd03c8-39d4-4d8f-98ff-823fe69b080e