chore: Add more multi-block tests for apply_diff tool

[p12tic]

Context

While working on #2260 I noticed lack of multi-block diff tests, so added these.

Implementation

New tests.

Screenshots

Not applicable.

How to Test

npm test

---

Important

Add tests for multi-block replacements and line number handling in multi-search-replace.test.ts.

• Tests:
  • Add tests for multi-block replacements in multi-search-replace.test.ts.
  • Include tests for handling line numbers in diffs.
  • Ensure applyDiff handles multiple blocks correctly.

^{This description was created by for bfac546. It will automatically update as commits are pushed.}

[changeset-bot]

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Latest commit: bfac546

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[mrubens]

Thank you!