Theme: move theme's nextCompletion implementation to Prompt.getNextCompletion
Theme: move theme's nextCompletion implementation to Prompt.getNextCompletion

darcs-hash:20080216133738-32816-bcecfaa205c235b6e480a25bdc03d222aa205d51

yzhou61/xmonad-contrib,yzhou61/xmonad-contrib,yzhou61/xmonad-contrib