Re: require-hard-newlines to use newline

[Chong Yidong]

> The idea of the yank-handler text property is that certain kill
> strings are encoded specially, and need to be decoded when they are
> yanked.  Maybe longlines could use this instead of a new hook for
> yanking.

It is possible to use the yank-handler property to remove the newlines
from longlines text when copying into other Emacs buffers; however, since
the newlines are copied onto the clipboard and X selection, they will show
up when the user does a paste in another application.  So this is not a
good approach.

> Or maybe you could just use after-change-functions.
> Would that work?

The only way I can see for this to work is for the after-change function
to test this-command, which I think is not very robust.

So I guess the best solution is to have an encoding hook for kills, and a
decoding hook for yanks.

I also think we should wait till after the release before implementing
this (which hopefully shouldn't be a long wait...)