I suggest adding a date-of-last-update or other identification to Makevars.template. It would help in discovering when Makevars needs to be updated. (Of course, determining that automatically, maybe as part of gettexize, would be better yet, and more reliable.)
A comment with a link to the version control history of the file seems like it would be useful too. Namely, http://git.savannah.gnu.org/cgit/gettext.git/log/gettext-tools/po/Makevars.template Best, Karl
