envutil.rb: define flush method
From: Nobuyoshi Nakada nobu@ruby-lang.org
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
envutil.rb: define flush method
and STDERR sometimes.
From: Nobuyoshi Nakada nobu@ruby-lang.org
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e