Reported by Assaf Gordon in
<https://lists.gnu.org/archive/html/bug-gnulib/2019-08/msg00045.html>
and by Reuben Thomas <rrt@sc3d.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2023-02/msg00020.html>.
* build-aux/po/Makefile.in.in: Sync from GNU gettext 0.23.
Fixes:
- Don't fail when 'make' is used with option -j.
- Pass the option --quiet to 'msgmerge'.
- Simplify by assuming that 'sed' groks comments.
* build-aux/po/remove-potcdate.sed: Renamed from
build-aux/po/remove-potcdate.sin.
* doc/gnulib.texi (Developer tools): Update file list.
* gnulib-tool.sh (func_import): Copy remove-potcdate.sed instead of
remove-potcdate.sin.
* pygnulib/GLImport.py (GLImport.execute): Likewise.