Bug#1021932: mdadm completion broken with some short options

[Marc F. Clemente]

Package: bash-completion
Version: 1:2.11-6

The following does not autocomplete:
mdadm --grow /dev/md126 -l 5 -n 4 -a /dev/nv [tab]

But this works:
mdadm --grow /dev/md126 -l 5 -n 4 --add /dev/nv [tab]