Switch to single intervals for FSF notices,
and consistently put them first.
Update copyright notices for 2024.
* cfg.mk (update-copyright-env): Use UPDATE_COPYRIGHT_FORCE=1,
UPDATE_COPYRIGHT_USE_INTERVALS=2.
* patch.man: Always use \(co, so that update-copyright
updates these dates.
* src/version.c: Correct Larry Wall copyright years.
Since the code is identical when just checking if a utility is present on
the system or not, we can factorize it.
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Reported by Thomas Moschny <thomas.moschny@gmx.de>:
src/patch.c (main): Temporary output files are created in the same directory as
the output file. Make sure to remove them before removing empty files and
their empty ancestor directories; else the directories won't be empty.
tests/remove-directories: Add directory removal test case.
tests/Makefile.am (TESTS): Add new test case.
