Hi,

After some effort, I just finished a new extensive document in the devguide regarding how
to use the new PEG parser and the PEG grammar:

https://devguide.python.org/parser/

The document contains descriptions, backgrounds, references, guides, and tips. Ideally,
this will make it a bit easier for everyone that wants to deal with the grammar or the parser.

Hope that you find it useful :)

P.S. Thanks to everyone that helped with the review!

Regards from cloudy London,
Pablo Galindo Salgado