fails:ARGF.each_codepoint is a public method
fails:ARGF.each_codepoint does not require arguments
fails:ARGF.each_codepoint returns self when passed a block
fails:ARGF.each_codepoint returns an Enumerator when passed no block
fails:ARGF.each_codepoint yields each codepoint of all streams
fails:ARGF.each_codepoint when no block is given returns an Enumerator
fails:ARGF.each_codepoint when no block is given returned Enumerator size should return nil
