LGTM
https://codereview.appspot.com/557720043/diff/581940043/Documentation/GNUmakefile File Documentation/GNUmakefile (right): https://codereview.appspot.com/557720043/diff/581940043/Documentation/GNUmakefile#newcode304 Documentation/GNUmakefile:304: $(outdir)/contributor.texi: $(outdir)/ly-grammar.txt Please add an empty line here. https://codereview.appspot.com/557720043/
