style: Optimize serialization of identifiers of length <= 16
Much like we optimize to_ascii_lowercase. This also fixes a bug in Servo where attr() rules with an unknown namespace prefix are parsed, which is wrong.
style: Optimize serialization of identifiers of length <= 16
Much like we optimize to_ascii_lowercase. This also fixes a bug in Servo where attr() rules with an unknown namespace prefix are parsed, which is wrong.
