When --case-replacements is used and files already have sequences like \E it does the wrong thing.

[nevdelap]

Make it not change existing \E \T \U \L, etc when doing case replacements. I think it just needs to change them to something special, that should never exist in real life, as it does it. e.g. replace \E with '--ned--E--ned--' in the replacement string and subsequent case processing, or something.

[nevdelap]

Done.