style: format code with Rustfmt

[deepsource-autofix]

This commit fixes the style issues introduced in bd7854c according to the output
from Rustfmt.

Details: None

[deepsource-io]

Here's the code health analysis summary for commits bd7854c..570cad2. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Rust	❌ Failure	❗ 20 occurences introduced 🎯 20 occurences resolved	View Check ↗

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