Format merge tests with black Co-authored-by: balajirajput96 <124477404+balajirajput96@users.noreply.github.com>

[balajirajput96]

No description provided.

[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[Copilot]

Pull Request Overview

This PR formats merge tests with the black code formatter to ensure consistent code style across the test files.

• Adds two new test functions for the Git merge handler
• Implements test coverage for both successful merge and merge conflict scenarios

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[balajirajput96]

This pull request adds new tests to improve coverage for the Git merge functionality in the JupyterLab Git extension. The new tests verify both successful and conflict scenarios when merging branches via the GitMergeHandler.

Testing improvements:

• Added test_merge_handler_success to verify that merging a branch using GitMergeHandler returns the expected success response and calls the underlying merge method with correct arguments.
• Added test_merge_handler_conflict to ensure that merge conflicts are handled gracefully, returning a 500 response and the appropriate error message when the underlying merge method indicates a conflict.

[balajirajput96]

Approved

[balajirajput96]

This pull request adds new tests for the Git merge handler to improve coverage of merge operations, including both successful merges and merge conflicts.

Added tests for Git merge handler:

• Added test_merge_handler_success to verify that the merge handler correctly merges a branch and returns a successful response when there are no conflicts.
• Added test_merge_handler_conflict to ensure the merge handler properly handles merge conflicts and returns an appropriate error response.