Lint/RedundantCopDisableDirective: Unnecessary disabling of `RSpec/RepeatedExampleGroupBody`.

Lint/AmbiguousRegexpLiteral: Ambiguous regexp literal. Parenthesize the method arguments if it's surely a regexp literal, or add a whitespace to the right of the `/` if it should be a division.

Style/RegexpLiteral: Use `%r` around regular expression. (https://rubystyle.guide#percent-r)

RSpec/EmptyLineAfterExampleGroup: Add an empty line after `describe`. (https://rspec.rubystyle.guide/#empty-lines-between-describes, https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/EmptyLineAfterExampleGroup)

Lint/RedundantCopDisableDirective: Unnecessary disabling of `RSpec/RepeatedExampleGroupBody`.