[FIX] Apply Ruff fix to chainladder/methods.

[genedan]

Summary of Changes

Stacked pull request on #1290. Fixes chainladder/methods files.

Related GitHub Issue(s)

#1216

Additional Context for Reviewers

Checklist

• I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)

---

Note

Low Risk
Cosmetic and lint-only changes; reserve method behavior should be unchanged aside from docstring rendering in MackChainladder.

Overview
Brings chainladder/methods (and its tests) in line with the project Ruff rules as part of the #1216 cleanup stack on #1290. There is no intended change to reserving logic—only style and lint hygiene.

Library code: Drops unused numpy imports from base.py, capecod.py, and top-level mack.py; normalizes quotes, spacing, docstrings, and line breaks (including MackChainladder’s class docstring layout and **2 operator formatting). MethodBase.validate_X keeps the sklearn-style name with an explicit # noqa: N802.

Tests: Same mechanical formatting in test_benktander, test_capecod, test_mack, and test_predict.

Config: Removes the per-file Ruff per-file-ignores entries for those methods modules now that they pass without exemptions.

^{Reviewed by Cursor Bugbot for commit 198832c. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

Pyright Type Completeness

View the full pyright --verifytypes output for this commit

Project (full chainladder package, at this PR's head): 15.4% of exported symbols fully typed (213 / 1381)

	Known	Ambiguous	Unknown	Total
Project (head)	213	111	1057	1381

Other symbols referenced but not exported by chainladder: 13

	Known	Ambiguous	Unknown	Total
Other (head)	3	1	9	13

Symbols without documentation:

• Functions without docstring: 325
• Functions without default param: 0
• Classes without docstring: 10

Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.66%. Comparing base (2b7f098) to head (198832c).

Files with missing lines	Patch %	Lines
chainladder/methods/mack.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                     @@
##           gd_ruff_fix_development    #1295      +/-   ##
===========================================================
- Coverage                    91.67%   91.66%   -0.01%     
===========================================================
  Files                           93       93              
  Lines                         5440     5437       -3     
  Branches                       704      704              
===========================================================
- Hits                          4987     4984       -3     
  Misses                         328      328              
  Partials                       125      125              

Flag	Coverage Δ
unittests	91.66% <94.11%> (-0.01%)	⬇️

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