: ${UPDATE_COPYRIGHT_YEAR=$(date +%Y)}
export UPDATE_COPYRIGHT_YEAR
-emacsver=etc/refcards/emacsver.tex
+emacsver=etc/refcards/emacsver.tex.in
sed 's/\\def\\year[{][0-9]*[}]/\\def\\year{'"$UPDATE_COPYRIGHT_YEAR"'}'/g \
$emacsver >$emacsver.aux &&
{ cmp -s $emacsver $emacsver.aux ||