A Prolog quine

[triska]

Dear all,

since #301 and several related issues involving writeq/1 are now nicely resolved, and due to Scryer Prolog's convenient string handling, we are able to define a very readable quine in Prolog! I have uploaded such a Prolog quine at:

https://www.metalevel.at/various/quine.pl

To try it, download the program and run it with Scryer Prolog using:

$ scryer-prolog -g quine,halt quine.pl

The only result of the program is that it emits its own source code on the terminal.

I bootstrapped quine.pl from quinebs.pl, avaliable from:

https://www.metalevel.at/various/quinebs.pl

Please see the included instructions for more details.

Enjoy, and thank you a lot for making this possible!

All the best,
Markus