Replace the single unsafe libc::kill() call with safe rustix
equivalents: kill_process, kill_process_group,
kill_current_process_group, and their test_kill_* variants for
signal 0.
`Mode::from_bits_truncate(DEST_INITIAL_MODE)` failed to build on macOS
because `mode_t` is `u16` there but `u32` on Linux. Compose the mode
from `Mode::RUSR | Mode::WUSR` so the call is portable by construction
and self-documents the intent (read+write owner = 0o600).
* factor: emit GNU's 'X is not a valid positive integer' wording
GNU's factor.c routes both stdin and command-line input through the same
print_factors() and reports invalid input as
factor: 'X' is not a valid positive integer
Match that wording exactly so the new GNU 9.11 'nul4' test passes and
the 'cont' test no longer needs the warning/invalid-digit hunk in
tests_factor_factor.pl.patch.
* Add 'cmdline' to spell-checker ignore list
GNU coreutils 9.11 changed fail-perm.sh to use the EACCES helper
in the expected diagnostics. Match the full diagnostic line so the
existing uutils message adaptation still applies.
Sylvestre Ledru
oech3
karanabe
Guillem L. Jara
pocopepe
renovate[bot]
xtqqczze
Chris Denton