As mentioned in #6573

A corner case that is yet to be addressed is when a non-utf8 filename does not exist and it is escaped before being displayed

$ ../../../gnu/src/cksum -c CHECKSUM                 
../../../gnu/src/cksum: 'XXX'$'\377''XXX': No such file or directory    # escaped
XXXXXX: FAILED open or read
../../../gnu/src/cksum: WARNING: 1 listed file could not be read

$ ../../target/debug/cksum -c CHECKSUM                                 
../../target/debug/cksum: XXX�XXX: No such file or directory           # not escaped
XXXXXX: FAILED open or read
../../target/debug/cksum: WARNING: 1 listed file could not be read