io.c: copy in binary mode
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42709 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io.c: copy in binary mode
patch by godfat (Lin Jen-Shin) at [ruby-core:56556].
[ruby-core:56518] [Bug #8767]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42709 b2dd03c8-39d4-4d8f-98ff-823fe69b080e