make the display spec parsing nicer. Inspired by this blog post: http://michaelxavier.net/posts/2015-02-20-A-Hidden-Gem-in-Control-Applicative.html
make the display spec parsing nicer.
Inspired by this blog post: http://michaelxavier.net/posts/2015-02-20-A-Hidden-Gem-in-Control-Applicative.html

emmanueltouzery/imprint