GZip::GzReader.open instead of GZip::GzReader.new with File.new.
fixed a test error on Windows introduced at r33946.
* ChangeLog: mention the causes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33981 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
When external encoding is not specified, it uses default external
encoding. But it depends the environment. So specify as UTF-8 for
environments whose locale is not UTF-8.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29302 b2dd03c8-39d4-4d8f-98ff-823fe69b080e