codeclimate/codeclimate-rubocop

This cop identifies uses of `Range#include?`, which iterates over each
item in a `Range` to see if a specified item is there. In contrast,
`Range#cover?` simply compares the target item with the beginning and
end points of the `Range`. In a great majority of cases, this is what
is wanted.

Here is an example of a case where `Range#cover?` may not provide the
desired result:

      ('a'..'z').cover?('yellow') # => true