body.tex: $(X) preprocess
./preprocess $(X) >$@
-%ChangeLog:
-% git-log -C --pretty=medium --since='4 weeks ago' --stat | grep -v '^---' >ChangeLog
+ChangeLog:
+ git-log -C --pretty=medium --since='4 weeks ago' --stat | grep -v '^---' >ChangeLog
clean::
rm -f body.tex ChangeLog