Apply `xo --fix` on a few files

Merged Roberto José TORO OLMEDO requested to merge github/fork/daniloisr/xo-autofix into master

Created by: daniloisr

This is the first step to fix linter errors.

I'll be tunning XO config according to the project style.

Issue related https://github.com/OpenNeuroLab/BrainBox/issues/168

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