>
> Thanks for the well justified request. This patch avoids moving point
> to the prompt on the rightful assumption that most of the time the users
> would not want to edit read-only text:

This breaks the history retrieval feature with up arrow.

With the current implementation up arrow takes you into the prompt, but if
you are in the top line of the prompt and press up arrow again then up
arrow retrieves history.

In the case I described going into the prompt is useless, so up arrow
should retrieve history immediately, without having to go to the top
line of the prompt first.