fails:Regexp#options returns a Fixnum bitvector of regexp options for the Regexp object
fails:Regexp#options allows checking for presence of a certain option with bitwise &
fails:Regexp#options raises a TypeError on an uninitialized Regexp
fails:Regexp#options includes Regexp::FIXEDENCODING for a Regexp literal with the 'u' option
fails:Regexp#options includes Regexp::FIXEDENCODING for a Regexp literal with the 'e' option
fails:Regexp#options includes Regexp::FIXEDENCODING for a Regexp literal with the 's' option
fails:Regexp#options does not include Regexp::FIXEDENCODING for a Regexp literal with the 'n' option
fails:Regexp#options includes Regexp::NOENCODING for a Regexp literal with the 'n' option
