Add warning about ~/.netrc for Poetry credential configuration

[nickhudkins]

Added warning about potential authorization issues with Poetry and .netrc file.

I didn't even have this issue, but I sat next to someone who did, for many hours, and it was painful to say the least. Finding that there is an outstanding issue with people suggesting a change to the documentation but then not proposing that change, I figured I'd go ahead and.... do the thing.

Pull Request Check List

Doesn't resolve but until it is, may as well let folks know:
#8443

• Added tests for changed code.
• Updated documentation for changed code.

Summary by Sourcery

Documentation:

• Add a warning about ~/.netrc potentially conflicting with Poetry's configured repository authentication and causing authorization failures.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Documents a known issue where a ~/.netrc file can override Poetry’s configured HTTP basic auth credentials and adds a prominent warning to the repositories configuration docs to help users debug authorization failures.

Flow diagram for debugging Poetry authorization failures due to .netrc

flowchart TD
  A[Configure http-basic credentials with poetry config] --> B[Run poetry install or update]
  B --> C{Authorization succeeds?}
  C -->|Yes| D[Continue normal workflow]
  C -->|No| E[Check for presence of ~/.netrc]
  E --> F{Does ~/.netrc exist?}
  F -->|No| G[Investigate other causes of auth failure]
  F -->|Yes| H[Inspect ~/.netrc for entries related to the repository host]
  H --> I{Conflicting credentials found?}
  I -->|No| G
  I -->|Yes| J[Modify or remove conflicting ~/.netrc entries]
  J --> K[Retry poetry command]
  K --> C

Loading

File-Level Changes

Change	Details	Files
Add a prominent warning in the repositories documentation about ~/.netrc potentially conflicting with Poetry’s configured authentication and causing authorization failures.	Insert a Hugo-style warning block immediately after the example of configuring http-basic credentials for a repository. Explain that users experiencing authorization failures should check for the presence of a ~/.netrc file, which can override Poetry’s configured credentials. Place the new warning before the existing warning about credentials appearing in command line history to ensure visibility during credential setup.	docs/repositories.md

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[sourcery-ai]

Hey there - I've reviewed your changes - here's some feedback:

• The warning text and dragon emoji are quite informal compared to the rest of the docs; consider rephrasing to a neutral, descriptive style that matches the existing documentation tone.
• It might help users if the warning briefly explains how ~/.netrc conflicts with Poetry authentication (e.g., precedence/override behavior) rather than just saying it is “known to conflict.”
• Clarify whether the ~/.netrc interaction applies to all repository types and authentication methods described on this page, or only certain configurations, so users know when this warning is relevant.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The warning text and dragon emoji are quite informal compared to the rest of the docs; consider rephrasing to a neutral, descriptive style that matches the existing documentation tone.
- It might help users if the warning briefly explains *how* `~/.netrc` conflicts with Poetry authentication (e.g., precedence/override behavior) rather than just saying it is “known to conflict.”
- Clarify whether the `~/.netrc` interaction applies to all repository types and authentication methods described on this page, or only certain configurations, so users know when this warning is relevant.

## Individual Comments

### Comment 1
<location> `docs/repositories.md:44-47` </location>
<code_context>
 ```
+{{% warning %}}
+🐉 HERE LIE DRAGONS 🐉
+If you have completed configuring credentials and are receiving authorization failures, check for the presence of `~/.netrc` which has been known to conflict with poetry's configured authentication.
+{{% /warning %}}

</code_context>

<issue_to_address>
**nitpick (typo):** Consider adding a comma before "which" and capitalizing "Poetry" for consistency.

For example: `...check for the presence of `~/.netrc`, which has been known to conflict with Poetry's configured authentication.`

```suggestion
{{% warning %}}
🐉 HERE LIE DRAGONS 🐉
If you have completed configuring credentials and are receiving authorization failures, check for the presence of `~/.netrc`, which has been known to conflict with Poetry's configured authentication.
{{% /warning %}}
```
</issue_to_address>

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[nickhudkins]

Ain't no clanker making docs suggestions to me!

(Written by Claude 🤖)

— proof.

[ajchili]

I am the someone. While we did not immediately reference docs, having this be explicitly called out will help others.

[github-actions]

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[adam-huganir]

lol @nickhudkins i just spent a day fighting this issue

[nickhudkins]

HOLD THE HECK ON RIGHT NOW MISTER HUGANIR! How have you been?! Let's move this to a social networking platform, like phones or something. If I recall properly, we were nearly number neighbors,