cargo fmt

[ShantanuKumar]

If we don't automate it, we will have to keep repeating it.

[mtshiba]

Thanks you.

I created .pre-commit-config.yml. This problem should no longer occur.
fa33a20

[ShantanuKumar]

I would suggest adding other some pre-commit config hooks from the list here

repos:
-   repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v2.3.0
    hooks:
    -  id: end-of-file-fixer
    -  id: trailing-whitespace
    - id: check-merge-conflict