Auto remove trailing whitespace with pre-commit

[jbampton]

https://github.com/pre-commit/pre-commit-hooks#trailing-whitespace

Description

This PR...

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[Copilot]

Copilot review overview

🟢 Approval recommended

The filter change is correct and the legal-file edits only remove trailing whitespace.

Review effort: Balanced
Findings: None

What changed in this PR

Expands trailing-whitespace enforcement to nested license and notice files and cleans existing violations.

Changes:

• Broadens the pre-commit filename filter.
• Removes trailing whitespace from Whisker legal files.

File	Description
.pre-commit-config.yaml	Includes nested LICENSE, NOTICE, and README files.
tools/​whisker/​LICENSE	Removes trailing whitespace.
tools/​whisker/​NOTICE	Removes trailing whitespace.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 3.71%. Comparing base (1a48a87) to head (b79f9ac).

❗ There is a different number of reports uploaded between BASE (1a48a87) and HEAD (b79f9ac). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (1a48a87)	HEAD (b79f9ac)
unittests	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##               main   #14288       +/-   ##
=============================================
- Coverage     19.91%    3.71%   -16.21%     
=============================================
  Files          6373      487     -5886     
  Lines        577230    41992   -535238     
  Branches      70696     7942    -62754     
=============================================
- Hits         114950     1558   -113392     
+ Misses       449713    40208   -409505     
+ Partials      12567      226    -12341     

Flag	Coverage Δ
uitests	3.71% <ø> (ø)
unittests	?

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