- Handle short-suffix compressed Tar archives.
- Test separately if a source file exists and is regular.
- Use return value of test_extension() instead of test equality of DEST
and SOURCE.
xzize:
- Fix bug with file names with spaces.
- Fix bug when invoking program without arguments.
- Handle error when input file is not a regular file instead of delegate
to xz.
- Add an info message when compressing an uncompressed file.
lz:
- Info message on stdout instead of stderr when uncompressing.