Verify the ABNF

[workingjubilee]

I like that progress is being made on various tweaks to the ABNF to bring it closer to the README's requirements, I have to ask, even at the risk of sounding dumb:

What would verifying the ABNF even mean? https://github.com/toml-lang/toml/projects/1#card-21107891

[pradyunsg]

What would verifying the ABNF even mean? toml-lang/toml/projects/1#card-21107891

Making sure that all the rules are in sync with what the README states and to sit and try to identify things like #640.

[pradyunsg]

I don't think anything other than #640 is left here.

I was wrong; this got posted accidentally. 🙈

[pradyunsg]

Now, I actually think #640 (and open PRs) are the only thing left to do here.

[pradyunsg]

I went through the ABNF today -- while I'm sure there's some degree of inattention-due-to-familiarity concerns, the ABNF seems to be pretty much in sync with the README so I'm gonna go ahead and close this now.