class RSpec::Matchers::BuiltIn::Include

def format_failure_message(preposition)
  msg = if actual.respond_to?(:include?)
          "expected #{description_of @actual} #{preposition}" \
          " include#{readable_list_of @divergent_items}" \
          "#{count_failure_reason('it is included') if has_expected_count?}"
        else
          "#{yield}, but it does not respond to `include?`"
        end
  improve_hash_formatting(msg)
end