Change WriterObj.writeline to WriterObj.write

[remilapeyre]

This cleans the csv module a bit, I don't think it requires a bpo issue or a news entry.

[csabella]

@remilapeyre, this isn't a trivial issue, so it would require a bpo issue. Thanks!

[asvetlov]

Usually, we discourage PRs like this: it just renames the internal name without providing any extra functionality or bug fixing.

[csabella]

@remilapeyre, thank you for the suggestion, but I'l close this based on @asvetlov's comment.

[remilapeyre]

Hi @asvetlov, @csabella ! It was asked by @vstinner in #12306 (comment) as the previous naming was misleading.

[asvetlov]

Ok, I'm fine then.
Sorry, without the context your motivation was not very clear.

[miss-islington]

@remilapeyre: Status check is done, and it's a success ✅ .

[asvetlov]

Thanks, @remilapeyre