Add \vconcat markup command
tree19d022bbad1f0ab77d43d247ba3404e3b775157a
drwxr-xr-x - bin
drwxr-xr-x - etc
drwxr-xr-x - lib
-rw-r--r-- 2295 main.ly
drwxr-xr-x - out
drwxr-xr-x - scores
drwxr-xr-x - share