Reject invalid HTTP method token characters

[andrewkernel]

Summary

• reject request-line methods containing characters outside the HTTP token grammar
• add a regression test covering an invalid method containing (

Closes #715.

Testing

• python -m pytest --no-cov -n 0 -p no:cacheprovider cheroot/test/test_core.py

[read-the-docs-community]

Documentation build overview

📚 cheroot | 🛠️ Build #33334500 | 📁 Comparing 25e9292 against latest (3937fe1)

  🔍 Preview build  

6 files changed · ± 6 modified

± Modified

• genindex/index.html
• history/index.html
• pkg/cheroot/index.html
• pkg/cheroot.server/index.html
• pkg/cheroot.test/index.html
• pkg/cheroot.test.test_core/index.html

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.83%. Comparing base (3937fe1) to head (25e9292).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #833      +/-   ##
==========================================
- Coverage   78.15%   77.83%   -0.33%     
==========================================
  Files          41       41              
  Lines        4788     4800      +12     
  Branches      547      548       +1     
==========================================
- Hits         3742     3736       -6     
- Misses        906      922      +16     
- Partials      140      142       +2