@example
bin/gub mingw::lilypond-installer
make LILYPOND_BRANCH=stable/2.12 -f lilypond.make doc
-bin/gub --platform=darwin-x86 'git://git.sv.gnu.org/lilypond-doc.git?branch=stable/2.12'
+bin/gub --platform=darwin-x86 \
+ 'git://git.sv.gnu.org/lilypond-doc.git?branch=stable/2.12'
@end example
or