[xmonad] 2013-02-09 change to XMonad.Prompt.Shell breaks shell completion

The following change from 2013-02-09 breaks shell completion for me: hunk ./XMonad/Prompt/Shell.hs 65 + commandToComplete _ c = c It seems to be passing the entire string into compgen in order to get the file completions, but it should only pass the last word. I propose reverting this change. Comments are appreciated. (CCing c.lopez@kmels.net, who originally wrote the patch.)