merge revision(s) 57204:
r57203 needs r57204. io.c: use io_close to close ARGF
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57841 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 57204:
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57841 b2dd03c8-39d4-4d8f-98ff-823fe69b080e