digits can't be buffer names in ex commands, because it would make
tree9cfd603c65f889404a517347ed4c944c65184b99
-rw-r--r-- 5762 README
drwxr-xr-x - common
drwxr-xr-x - docs
drwxr-xr-x - ex
drwxr-xr-x - vi