The suggested history completion on the reedline (i.e. fish-like
autosuggestion) can be fully completed with the `l` key in vi cmd mode.
This change adds the ability to complete the suggestion partially by
completing the current word using `e`. If no history suggestion exists
it moves to the end of the current word as usual.
This mimics the partial completion I have set up in zsh with the help of
the `zsh-autosuggestions` plugin.
Marty Oehme
b305be8ad0
