Allow trailing comma

[HyeonuPark]

Allow trailing comma within macro call.
And some tiny fixes I found.

[coveralls]

Coverage remained the same at 87.092% when pulling 143ecda on HyeonuPark:allow-trailing-comma into 3dd6672 on Geal:master.

[coveralls]

Coverage remained the same at 87.092% when pulling 143ecda on HyeonuPark:allow-trailing-comma into 3dd6672 on Geal:master.

[Geal]

hmm, that's a lot of changes for something I'm not really convinced is useful. Why do you need trailing commas in argument lists?

[HyeonuPark]

Nom macros tend to be deeply nested, so it should usually be split into multiple lines.

And there's two major style rules for multiline function call: comma-first and comma-last

I saw you prefer comma-first style for your own code, but many people in Rust community likes comma-last with trailing comma.

So it will be nice to allow trailing comma in nom macros!

[perlun]

I saw you prefer comma-first style for your own code, but many people in Rust community likes comma-last with trailing comma.

To give my 0,02€ of this, we really don't know this. We just know that those who like trailing comma tend to raise their voice louder and share their opinion.

Until someone really does an exhaustive poll/examination of some sort, I think we should be careful to draw too far-reaching conclusions from that discussion.

(Disclaimer: I am the author of the linked issue, where I advocated that the default Rust style should not advocate trailing comma. 😃 Since writing that flamebait, I have given trailing comma a chance in a minor TypeScript project, and it's not that bad once you get used to it.)

[Geal]

closing this, it's not really useful for nom, sorry