Refine error message for time interval
From: shuujii (Shuji KOBAYASHI) shuujii@gmail.com
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66418 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by nobu (Nobuyoshi Nakada) almost 7 years ago
Refine error message for time interval
only positive. [ruby-dev:50709] [Bug #15420]
From: shuujii (Shuji KOBAYASHI) shuujii@gmail.com
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66418 b2dd03c8-39d4-4d8f-98ff-823fe69b080e