rubocop

Lint Ruby files. More information: https://docs.rubocop.org/rubocop/usage/basic_usage.html.

• Check all files in the current directory (including subdirectories):
  rubocop
• Check one or more specific files or directories:
  rubocop {{path/to/file}} {{path/to/directory}}
• Write output to file:
  rubocop --out {{path/to/file}}
• View list of cops (linter rules):
  rubocop --show-cops
• Exclude a cop:
  rubocop --except {{cop_1}} {{cop_2}}
• Run only specified cops:
  rubocop --only {{cop_1}} {{cop_2}}
• Auto-correct files (experimental):
  rubocop --auto-correct