Fix POETRY_REPOSITORIES_ variable docs

[SamambaMan]

POETRY_REPOSITORIES__URL wrong in the documentation

Pull Request Check List

Resolves: #8491

No changes are required to the code.

[dimbleby]

it's not so simple as that: POETRY_REPOSITORIES_<NAME>_URL is specifically for setting the url associated with a repository ie it corresponds to repositories.<name>.url.

I can believe that there are clarity improvements to be made here and it would be good to see that: but I don't think this MR as it stands helps with that

[SamambaMan]

What do you suggest?
I merely wrote the same as it in the code (i think) for doing as the manual won't work.

Do you want me to explain that the should match naming in sources?

[dimbleby]

the current doc has a heading repositories.name. You are reporting - I think rightly - that as an environment variable this isn't very useful because you never want to configure only a repository name: you want to configure sub-properties of the repository (in particular, the URL).

However your MR leaves that heading alone, so now the doc is not self-consistent.

I realise that disentangling this is more than the four character fix you were hoping for!

[SamambaMan]

Oh, i get it now.
This should cover other parameters as priority as well, right?
I'm hovering the code and this is not supported code wise yet also, right?

[dimbleby]

As I understand it, global repository configuration is only interesting during publishing, so eg priority is irrelevant - I think url is the only interesting property.

[SamambaMan]

So...? :D

[dimbleby]

So: put some or more of that in the docs!

[SamambaMan]

@dimbleby check if this is better.
Also included fixes for basic auth as tested in

poetry/tests/utils/test_authenticator.py

Line 355 in 47a3a19

monkeypatch.setenv("POETRY_HTTP_BASIC_FOO_USERNAME", "bar")

[SamambaMan]

Can I improve this PR in any way?
Let me know

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