Fix formatting

Co-authored-by: Olle Jonsson <olle.jonsson@gmail.com>

spec/lib/vcr/cassette_spec.rb

@@ -666,6 +666,7 @@ def interaction(response_body, request_attributes)
             end
             context "with drop_unused_requests option added to all" do
               let(:drop_unused_requests) { true }
+
               it "drops unused requests" do
                 expect(saved_recorded_interactions).to match_array([interaction_bar, interaction_foo_2])
               end