fix python fetching when environment markers present

[jakecoffman]

What are you trying to accomplish?

Fixes an error in Python projects when there is a semicolon present near a path-based dependency.

Semicolons unsed in this way are environment markers defined in PEP-508 so we just needed to add them to the regex to strip them out.

Anything you want to highlight for special attention from reviewers?

How will you know you've accomplished your goal?

I tested this against a repo that was failing and it's working now. Unit test also passes.

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[jakecoffman]

The failing test is unrelated and fixed by #14562

[Copilot]

Pull request overview

Fixes Python requirements file fetching when path-based dependencies include PEP-508 environment markers (semicolon syntax), preventing Dependabot from mis-parsing the path and incorrectly erroring on missing local wheel/sdist artifacts.

Changes:

• Update requirements path-dependency regexes to stop path capture at ; (environment marker delimiter).
• Add a GitHub API fixture for a requirements.txt containing a local .whl dependency with an environment marker.
• Add an RSpec case ensuring environment markers don’t cause path-dependency fetch failures.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
python/lib/dependabot/python/shared_file_fetcher.rb	Adjusts path-dependency scanning regexes to exclude ; so env markers aren’t treated as part of the path.
python/spec/dependabot/python/file_fetcher_spec.rb	Adds coverage for a local wheel path with env markers to ensure fetching doesn’t raise.
python/spec/fixtures/github/requirements_with_whl_env_marker.json	Adds a fixture requirements content including a wheel path plus a PEP-508 marker.

[brrygrdn]

Nice find 👍🏻