Try using the option key.  It's already implemented.

On Tue, Dec 3, 2013 at 9:47 AM, Robert Carpenter <rob...@robacarp.com> wrote:
> Hi fish-users,
>
> I've been running a lot of similar commands lately and I've been really
> grateful for the fish command suggestion feature. One thing I've come across
> is a situation where I only want to take the next word or two from the
> suggestion and then finish the command differently from the way fish
> suggested.
>
> As an example, if the command history contains:
>
> ssh robert@server 'ls /home'
>
> then when I type 'ssh' the suggestion will be the full command. If I instead
> want to run `ssh robert@server 'ls /etc'` I can either type out the full
> command or accept the full completion and ^W back over a few words to put in
> what I want.
>
> I am thinking that it would be useful for me to have a "complete next word"
> key, which would take the completion up to some token marker (whitespace or
> quote or whatever makes sense here). Then my input strategy would be more
> like this:
>
> - type ssh, see suggestion for `ssh robert@server 'ls /home'`
> - ^G to take 'robert@server'
> - type the rest of the command manually
>
> Thoughts?
>
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