completion: handle short opts without spaces #586
Draft
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Apparently some people want to use clush -wfoo...
(Since it's a different issue than #585 this is open as a different PR, I don't like the merge queue squashing unrelated commits :p Note it should be merged after #585 as I've left the other commit in for easier testing, but there's no conflict so we could rebase if required. Opened as draft because of this.)