Remove dead code in StringHelper::truncateWordsByLength()

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

The branch existed to handle $cut === '', returning mb_substr($trimMarker, 0, $length, $encoding). But $length > $markerLength is already guaranteed by the earlier check on line 376, so that mb_substr call always returns $trimMarker in full — the same value the general branch produces via $cut . $trimMarker when $cut is empty. So the
special-case branch never changed the output; it was redundant dead code duplicating the general case.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d12072d) to head (23b5c07).

Additional details and impacted files

@@              Coverage Diff              @@
##             master      #167      +/-   ##
=============================================
+ Coverage     99.79%   100.00%   +0.20%     
+ Complexity      172       171       -1     
=============================================
  Files             7         7              
  Lines           478       476       -2     
=============================================
- Hits            477       476       -1     
+ Misses            1         0       -1     

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[Copilot]

Pull request overview

This PR removes a redundant special-case branch in StringHelper::truncateWordsByLength() that never altered the returned value due to the existing $length <= $markerLength guard, simplifying the word-boundary truncation path without changing behavior.

Changes:

• Simplified the “last space within snippet” return path in StringHelper::truncateWordsByLength() by removing dead code.
• Documented the internal cleanup in CHANGELOG.md under the upcoming release.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/StringHelper.php	Removes an unreachable/redundant conditional branch and returns the same value via the general concatenation path.
CHANGELOG.md	Adds an entry noting the dead-code removal enhancement.

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