Incorrect mapping for xz-archives
The builtin @map_full_type_to_short_type_maps
confvar predefines [qr/^xz compressed\b/ => 'xz']
, while file
prints XZ compressed data
for xz-Archives since https://github.com/file/file/commit/e6b40155310704eb98c79b0a77f9683dd84b2869.