[Docs] improve code formatting and comments for eliminate griffe build warning.

[samzong]

Purpose

fix griffe build warning.

modified:   vllm/benchmarks/serve.py
modified:   vllm/distributed/eplb/eplb_state.py
modified:   vllm/distributed/eplb/rebalance_algo.py

sources:

WARNING -  griffe: vllm/benchmarks/serve.py:141: Confusing indentation for continuation line 17 in docstring, should be 4 * 2 = 8 spaces, not 5

Test Plan

Test Result

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Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Code Review

This pull request introduces a series of formatting and documentation improvements across several files. The changes primarily focus on fixing indentation in docstrings, reformatting import statements for better readability, and enhancing the clarity of function return value descriptions in docstrings. These modifications are consistent with the goal of eliminating griffe build warnings and improving overall code maintainability. The changes are well-executed and I have no further suggestions.

[mgoin]

LGTM, thanks! cc @hmellor

[windsonsea]

Related to issue #25020

[hmellor]

Could you move the whole shapes onto the next line so it's easier to read?