bug#14737: 24.3.50; quarter-plane-mode: Move it to Emacs core

[Michael Heerdegen]

Jambunathan K <kjambunathan@gmail.com> writes:

> quarter-plane-mode
>
> Please consider it moving to the core. It rightfully belongs to
> picture.el as a minor mode.  The file is not too big.

As a user: +1!  `quarter-plane' is just the canonical minor-mode of
`picture-mode'.  For real-life situations, I think it is even more
useful.

I would suggest to merge it into picture.el if possible.


Michael.