Small formatting fix

[krammnic]

Context

What is the purpose of this PR? Is it to

• add a new feature
• fix a bug
• update tests and/or documentation
• other (please add here)

Please link to any issues this PR addresses.

Changelog

What are the changes made in this PR?

• Nit: inconsistent linting in qwen2.5 tokenizer test #2208

Test plan

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• run pre-commit hooks and linters (make sure you've first installed via pre-commit install)
• add unit tests for any new functionality
• update docstrings for any new or updated methods or classes
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• run recipe tests via pytest tests -m integration_test
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UX

If your function changed a public API, please add a dummy example of what the user experience will look like when calling it.
Here is a docstring example
and a tutorial example

• I did not change any public API
• I have added an example to docs or docstrings

Really small change to make it readable.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchtune/2256

• 📄 Preview Python docs built from this PR

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⏳ No Failures, 2 Pending

As of commit 35e8fe3 with merge base e79ab8b ():
💚 Looks good so far! There are no failures yet. 💚

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.85%. Comparing base (e79ab8b) to head (efcbd52).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2256      +/-   ##
==========================================
+ Coverage   64.31%   66.85%   +2.54%     
==========================================
  Files         352      352              
  Lines       20569    20543      -26     
==========================================
+ Hits        13228    13735     +507     
+ Misses       7341     6808     -533     

☔ View full report in Codecov by Sentry.
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[krammnic]

Weird, let me fix.