LGTM
trim GNUmakefile a bit
commit 19faa30b9771b519c120344eda5fea262dd60c74 Author: Han-Wen Nienhuys <hanwen@lilypond.org> Date: Fri Mar 6 19:55:04 2020 +0100 Move metafont stepmake templates into mf/GNUmakefile https://sourceforge.net/p/testlilyissues/issues/5827 http://codereview.appspot.com/577610043