pub fn encode_ifc_string(s: &str) -> Cow<'_, str>Expand description
Encode a UTF-8 string back to IFC STEP escapes. Inverse of
decode_ifc_string for the canonical (non-overlong) forms; kept for STEP
writers and round-trip tests.
Printable ASCII is preserved; everything else (and backslash) is escaped as
\X\HH, \X2\HHHH\X0\, or \X4\HHHHHHHH\X0\ by code point.