Lint Ruby files. More information: https://docs.rubocop.org/rubocop/usage/basic_usage.html.
rubocop
rubocop path/to/file path/to/directory
rubocop --out path/to/file
rubocop --show-cops
rubocop --except cop_1 cop_2
rubocop --only cop_1 cop_2
rubocop --auto-correct