[Backport to old-release] Add additional check to some-file-new-name

[agent-backport]

Backport: Add additional check to some-file-new-name

Summary

This is a backport of a low-complexity test enhancement that adds a third check to an existing test file, expanding test coverage for the old-release branch.

Original PR

• Repository: gr2m/sandbox
• Original PR: #315
• Title: Add additional check to some-file-new-name

Changes

• Added a third check (", 3") to existing test sequence that previously contained "check 1, 2"
• Change Type: Test-only modification
• Complexity: Low

Backport Notes

• ✅ Low Risk: This is a test-only change that doesn't affect production code
• ✅ Clean Backport: Expected to merge cleanly into old-release branch
• ✅ Additive Change: Only expands test coverage without removing existing functionality

Testing Recommendations

• Run full test suite after merge to ensure compatibility with older codebase
• Verify that the additional test check doesn't conflict with any existing test expectations in the release branch

Potential Considerations

While this is a minimal risk change, verify that no other parts of the system depend on the exact previous content of this test file.