fmt: rustfmt arigraph/community.rs (unblocks main CI after #714)

[AdaWorldAPI]

What

#714 (feat(arigraph): community.rs, D-GR-3a) merged without cargo fmt, so cargo fmt --manifest-path crates/lance-graph/Cargo.toml -- --check now fails on main and blocks CI on every subsequent PR.

This applies cargo fmt to that one file. Pure formatting — zero semantic change (block-body vs single-line closures, struct-literal field wrapping, test tuple wrapping — exactly the diff the CI job printed).

Verification

• cargo fmt --manifest-path crates/lance-graph/Cargo.toml -- --check → clean.
• git diff --stat → single file (community.rs, 61+/21−); nothing else touched, confirming main is otherwise fmt-clean.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Awg6TXocHcwTtc6eGsHcdD

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Generated by Claude Code

Summary by CodeRabbit

• Style
  • Reformatted graph community detection code for improved readability.
  • Rewrapped related test data and assertions without changing behavior or expected results.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 356087d5-e04d-4301-aa6f-c0943dd47411

📥 Commits

Reviewing files that changed from the base of the PR and between 79ff75e and f7e01a0.

📒 Files selected for processing (1)

• crates/lance-graph/src/graph/arigraph/community.rs

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📝 Walkthrough

Walkthrough

Formatting-only updates rewrap community detection implementation and test code in community.rs; logic, public APIs, test data, assertions, and outcomes remain unchanged.

Changes

Community Detection Formatting

Layer / File(s)	Summary
Reformat implementation and tests crates/lance-graph/src/graph/arigraph/community.rs	Rewrapped community membership, graph construction, adjacency aggregation, function signatures, test edge lists, and truth-value construction without changing behavior or assertions.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: claude

Poem

A rabbit hops through neatly spaced code,
No logic changed along the road.
Graphs and tests now line up bright,
Every brace sits just right.
“Format!” I cheer, then nibble a byte.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the formatting-only change to community.rs and the CI fix context.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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