Fix duplicate plus operator in router backtracking logic

[yuya-morimoto]

Summary

This PR fixes a typo where searchIndex += +len(search) was incorrectly written with
duplicate plus operators. The correct expression should be searchIndex += len(search).

Description

Problem

In router.go at line 695, there is a syntax error with duplicate plus operators:

searchIndex += +len(search)

While Go interprets this as searchIndex = searchIndex + (+len(search)) (treating the
second + as a unary plus operator), it's clearly a typo and not the intended expression.

Solution

Changed the expression to the correct form:

searchIndex += len(search)

Impact

• Functionality: The behavior remains the same since Go's unary plus operator doesn't
change the value, but the code is now clearer and matches the intended logic.
• Readability: Improves code clarity by removing the confusing duplicate operator.

Testing

• Existing tests should continue to pass as the functional behavior is unchanged
• The fix is in the router's backtracking logic for "any" node matching

Location

• File: router.go
• Line: 695
• Function: Router.Find()

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.39%. Comparing base (f24aaff) to head (a9fcb3c).
⚠️ Report is 17 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2832      +/-   ##
==========================================
+ Coverage   93.25%   93.39%   +0.14%     
==========================================
  Files          39       39              
  Lines        4652     4666      +14     
==========================================
+ Hits         4338     4358      +20     
+ Misses        218      214       -4     
+ Partials       96       94       -2     

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[aldas]

Thanks