bug#10885: Replace expressions: enhance functionality when searching in filled paragraphs

[Stefan Monnier]

> Since query-replace is going in the direction of closer integration with
> isearch, the right thing would be to get its search function from isearch.

Agreed.

> This patch is based on the previously sent patch and could be installed
> in separate commits:

I haven't had much time to devote to this thread, but it generally looks
like it's moving in the right direction and I don't see any obvious
problem in your patch.


        Stefan