merge revision(s) 52211: [Backport #11610] [Backport #11637]
* io.c (argf_next_argv): check ARGV element type, and try conversion if necessary. [ruby-core:71140] [Bug #11610]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52650 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 52211: [Backport #11610] [Backport #11637]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52650 b2dd03c8-39d4-4d8f-98ff-823fe69b080e