test(cmd): fix non-consistent arg for t.Errorf

[macrat]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes an inconsistent argument format in a test function by adding a format specifier to a t.Errorf call.

• Adds a format string "%s" to t.Errorf to properly format the diff output

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.89%. Comparing base (b026ea7) to head (c2efaef).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #33   +/-   ##
=======================================
  Coverage   87.89%   87.89%           
=======================================
  Files          74       74           
  Lines        6466     6466           
=======================================
  Hits         5683     5683           
  Misses        644      644           
  Partials      139      139           

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