Fix #769 : Prevent double-wrapping of URLs in API generator

[N-Harsha-Vardhan-Dev]

Code of Conduct

Description

This PR fixes the logic in make_api.py that was causing URLs to be "double-wrapped" in Markdown brackets (e.g., [url](url)) on the documentation site. By adding a check in make_markdown_url, the generator now correctly ignores tokens that are already formatted as Markdown links, ensuring they render properly in the browser.

Related issues or pull requests

Fixes #769

Pull Request Checklist

• Added a note about the modification or contribution to the ./docs/sources/CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./mlxtend/*/tests directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under mlxtend/docs/sources/ (if applicable)
• Ran PYTHONPATH='.' pytest ./mlxtend -sv and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., PYTHONPATH='.' pytest ./mlxtend/classifier/tests/test_stacking_cv_classifier.py -sv)
• Checked for style issues by running flake8 ./mlxtend

[rasbt]

LGTM, thanks for the PR

[N-Harsha-Vardhan-Dev]

Thank you for the review! Glad to help with this fix.