Hi, Thanks for implementing dabbrev-expand in bash-4.0!
Unfortunately the behavior is not consistent with what dabbrev-expand does in Emacs (and tcsh), so it will be quite confusing for users to use. Doing # bind dabbrev-expand to it's canonical key: $ bind '"\M-/":dabbrev-expand' # Now run a few dummy commands to have stuff in history: $ foa $ fob $ foo # try using dabbrev-expand $ fo # now type M-/ # This will display: $ fo foa fob foo $ foa # Note that there's a space after "foa" and that all the possibilities # are displayed. This is not how dabbrev-expand normally works, it should not insert the extra space, nor should it show all the possibilities. For one thing the extra space is confusing: say you also have "foaa" in history, it's hard to guess that pressing M-/ again after seeing "foa " will result in "foaa " being inserted. When you have a lot of history, displaying the matches is not very useful, there can be hundreds of them. Just display a match and one can quickly cycle through them by repeatedly pressing M-/. The matches should be in history order, the most recent ones should be first, the older ones should follow.
