For the CICD on macOS, this fixes:
```
---- common::util::tests::test_check_coreutil_version stdout ----
---- common::util::tests::test_expected_result stdout ----
thread 'common::util::tests::test_expected_result' panicked at
'byte index 4 is out of bounds of `9.0`', tests/common/util.rs:1172:41
```
Replace two loops that print leading and trailing 0s when printing a
number in fixed-width mode with a single call to `write!()` with the
appropriate formatting parameters.
Ensure that the `print_seq_integers()` function is called when the first
number and the increment are integers, regardless of the type of the
last value specified.
Change the way `seq` computes the number of digits needed to print a
number so that it works for inputs given in scientific notation.
Specifically, this commit parses the input string to determine whether
it is an integer, a float in decimal notation, or a float in scientific
notation, and then computes the number of integral digits and the number
of fractional digits based on that. This also supports floating point
negative zero, expressed in both decimal and scientific notation.
This fixes an issue on macOS/bsd where multiple calls
to `host_name_for` each added a prefix 'g'.
The issue led to some tests being skipped because `util_name` was
renamed to e.g. "ggid" instead of "gid".
This makes it no longer possible to pass multiple filenames, but every
other implementation I tried (GNU, busybox, FreeBSD, sbase) also
forbids that so I think it's for the best.
* chown: support '.' as 'user.group' separator (like ':')
It also manages the case:
user.name:group (valid too)
Should fix:
gnu/tests/chown/separator.sh
* Fixed some documentation of display_item_long that was missed in #2623
* Implemented coloring of `ls -l` symlink targets( after the arrow `->`).
* Documented display_file_name to some extent.
* Ran rustfmt as part of mitigating CI chain errors.
* Removed unused variables and code in test_ls_long_format as per #2623
specifically, as per
https://github.com/uutils/coreutils/pull/2623#pullrequestreview-742386707
* Added a thorough test for `ls -laR --color` symlink coloring implemented in this branch.
* renamed test files and dirs to shorter names and ran rustfmt.
* Changed the order with which files are expected to match the change in their name.
* Bettered some comments.
* Removed needless borrow. Fixed that one clippy warning.
* Moved the cfg not windows up to the function level
because this function is meant to only run in non-windows OS (with
groups and unames).
Fixes the unused variable warning in CI.
