Function unescape_attribute 

pub fn unescape_attribute<'a, S: Into<Cow<'a, str>>>(escaped: S) -> Cow<'a, str>

Available on crate features unescape or unescape_fast only.

Expand all valid entities in an attribute.

This is only appropriate for the value of an attribute. See unescape_in() for more information.

To work with bytes ([u8]) instead of strings, see unescape_bytes_in().