[bug#70169] [PATCH 6/7] maint: Use reproducible Git timestamp for POT-Creation-Date.

[Janneke Nieuwenhuizen <janneke@gnu.org>]

Ludovic Courtès writes:

> Janneke Nieuwenhuizen <janneke@gnu.org> skribis:
>
>> +	date=$$(git log --pretty=format:%ci -n 1 -- $< 2>/dev/null	\
>> +		|| echo $(SOURCE_DATE_EPOCH))				\
>> +	sed -ri -e "s,^(.POT-Creation-Date: )[^\]*,\1$$date," $@-t
>> +	mv $@-t $@
>
> Nitpick: I'd use double quotes to avoid bad surprises:
>
>   date="$$(git log …)"
>   …
>   mv "$@-t" "$@"

Makes sense, thanks.