Use `rustix::process::test_kill_process` (a safe wrapper around
`kill(pid, 0)`) to eliminate the remaining `unsafe` blocks in
src/uu/tail/src/platform/unix.rs. This removes the direct `libc::kill`
calls and the `get_errno` helper, replacing them with idiomatic
`match` on `rustix::io::Errno` variants.

…ils#11716)

* fix(numfmt):fix recision loss for large numbers in uutils#11654

* numfmt: fix some tests in format.rs caused by importing numeric.rs

* add a file header and remove a redundant comment

* remove a redundant comment

* add a empty line between two functions

* refactor(numfmt): rename helper functions for accuracy; fix double negation logic

* forbid scientific notation arguments in numfmt

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Edit solution of #116555

* add scientific notation test

* change variable name

* use is_ascii_digit() instead of checking manually

Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>

* Apply suggestion from @cakebaker

Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>

uutils#11683)

* Update format.rs

* numfmt fix uutils#11667

* numfmt --format fix

* remove ignore of test for uutils#11667 in test_numfmt.rs

* Add space after slashes in a comment

Co-authored-by: Sylvestre Ledru <sylvestre@debian.org>

* change is_precision with a more understandable name

* Leave an empty line between functions

---------

Co-authored-by: Sylvestre Ledru <sylvestre@debian.org>

* numfmt: fix --to=auto to return with exitcode=1

* numfmt: update direct variable use in format macro

* numfmt_test: remove extra test

* numfmt: replacing format in translate directly

Per-binary comparison script that reads the existing
individual-size-result.json format (date-keyed with sha + sizes-in-KB)
and reports binaries whose size changed by both >=5% and >=4 KB.

This is the size-tracking counterpart of compare_test_results.py: it
emits GitHub workflow annotations and writes a PR comment body to its
--output path only when there is something significant to report.

Replace the inline shell loop that walked individual-size-result.json
with a call to util/compare_size_results.py and write its output, plus
the PR number, into a size-comment/ directory uploaded as an artifact.

The aggregate `multiple binaries` and `multicall binary` checks remain
inline since they are simple scalar comparisons. The new artifact is
consumed by the SizeComment workflow to post a PR comment, mirroring
the GnuTests / GnuComment pipeline.

Upstream commit 9f50c8b ("tee: fix input with sleep") already
contains the functional fix for short reads from a paused writer.
Keep the regression coverage so we do not reintroduce the bug.

The test writes one small chunk, waits long enough for a buggy tee to
exit, then writes a second chunk and asserts both stdout and the output
file receive both writes.

test_single_quote_pair_as_delimiter_is_invalid is intermittent on
i686: the parent writes "a''b\n" to cut's stdin while cut validates
args and exits immediately with "delimiter must be a single
character". On a fast child exit, the kernel closes the pipe
read-end before the parent's write() runs, so write() returns
EPIPE and the pipe_in thread panics.

The race is inherent: draining stdin in cut before exiting on an
arg error would hang on terminals and read unbounded data from
long pipes, contradicting GNU behavior. Use the test framework's
ignore_stdin_write_error() flag, which exists for exactly this
"parent writes to child that exits fast" pattern.

…test status

The `+1` accounting for the ACL/context indicator was applied once per
item inside the padding loop, so N files with ACLs inflated the
link-count column width by N. Apply it a single time after the loop.

Fixes uutils#10980

fix warning:

```
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
```