`msgfmt -vc` warns:
po/as.po:9: warning: header field 'Project-Id-Version' still has the initial default value
Update them all:
$ git grep -l Project-Id-Version | xargs sed 's/^"Project-Id-Version: \(.*\)\\n"$/"Project-Id-Version: NetworkManager\\n"/' -i
The documentation ([1]) says:
Project-Id-Version
This is the name and version of the package. Fill it in if it has not already
been filled in by xgettext.
but don't add the "version". We have these files in git on the devel branch,
so whenever we branch a new release, the version would change. Just say
"NetworkManager".
[1] https://www.gnu.org/software/gettext/manual/html_node/Header-Entry.html
