Updated Web tutorial (Discussion)

[EricGT]

For 16.2. Persistency

This expands to four predicates

I know the docs say four and even my Discourse post say four, but I think it is really five.

EDIT

That is awesome. It took me a whole 2 minutes just to scan the tutorial. That goes on my todo list as I really need to be handy in that area.

[anniepoo]

I think #5 is for internal use only.

[emacstheviking]

Thanks @anniepoo I for one have spent many hours reading this and all your other tutorial pages, and continue to learn a lot from them on repeated readings. I really appreciate the time it takes to make quality content.