fails:Regexps with encoding modifiers supports /e (EUC encoding)
fails:Regexps with encoding modifiers supports /e (EUC encoding) with interpolation
fails:Regexps with encoding modifiers supports /e (EUC encoding) with interpolation /o
fails:Regexps with encoding modifiers supports /s (Windows_31J encoding)
fails:Regexps with encoding modifiers supports /s (Windows_31J encoding) with interpolation
fails:Regexps with encoding modifiers supports /s (Windows_31J encoding) with interpolation and /o
fails:Regexps with encoding modifiers supports /u (UTF8 encoding)
fails:Regexps with encoding modifiers supports /u (UTF8 encoding) with interpolation
fails:Regexps with encoding modifiers supports /u (UTF8 encoding) with interpolation and /o
