Constant htmlize::REPLACEMENT_CHAR_BYTES

pub const REPLACEMENT_CHAR_BYTES: &[u8];

Unicode replacement character (U+FFFD “�”, requires unescape or unescape_fast feature)

According to the WHATWG HTML spec, this is used as an expansion for certain invalid numeric entities.

According to Unicode 12, this is “used to replace an incoming character whose value is unknown or unrepresentable in Unicode.” The latest chart for the Specials block is available as a PDF.