fails:Regexps with modifers supports /m (multiline)
fails:Regexps with modifers supports /x (extended syntax)
fails:Regexps with modifers supports /o (once)
fails:Regexps with modifers invokes substitutions for /o only once
fails:Regexps with modifers supports (?imx-imx) (inline modifiers)
fails:Regexps with modifers supports (?imx-imx:expr) (scoped inline modifiers)
fails:Regexps with modifers supports . with /m
fails(inherited):Regexps with modifers supports ASII/Unicode modifiers
fails:Regexps with modifers raises SyntaxError for ASII/Unicode modifiers
