class RuboCop::Cop::Minitest::RefuteInstanceOf

This cop enforces the use of `refute_instance_of(Class, object)` over `refute(object.instance_of?(Class))`.

@example

# bad
refute(object.instance_of?(Class))
refute(object.instance_of?(Class), 'message')

# good
refute_instance_of(Class, object)
refute_instance_of(Class, object, 'message')