fix trim trailing on reformer py

[vigo999]

What does this PR do?

Fixes # reformer pre-commit trim

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline?
• Did you make sure to update the documentation with your changes? E.g. record bug fixes or new features in What's New. Here are the
  documentation guidelines
• Did you build and run the code without any errors?
• Did you report the running environment (NPU type/MS version) and performance in the doc? (better record it for data loading, model inference, or training tasks)
• Did you write any new necessary tests?

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@SamitHuang @Cui-yshoho @zhanghuiyao

[gemini-code-assist]

Summary of Changes

Hello @vigo999, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a minor code formatting inconsistency by removing an unnecessary trailing whitespace character in the modeling_reformer.py file. This change is likely a result of a pre-commit hook enforcement to maintain clean code style.

Highlights

• Code Formatting: Removed a single trailing whitespace character in the modeling_reformer.py file, addressing a pre-commit hook trim issue.

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[gemini-code-assist]

Code Review

This pull request removes trailing whitespace from a docstring. This is a minor but good formatting fix that improves code style consistency. The change is correct.