Constant oniguruma::OPTION_NEGATE_SINGLELINE

pub const OPTION_NEGATE_SINGLELINE: Options = Options{bits: 64,}

Clear OPTION_SINGLELINE which is enabled on SYNTAX_POSIX_BASIC, SYNTAX_POSIX_EXTENDED, SYNTAX_PERL, SYNTAX_PERL_NG, SYNTAX_JAVA. This is compile time option.