docs cleanup

Author: joelhawksley

docs/guide/conditional_rendering.md

@@ -51,4 +51,4 @@ end
 <%= render(ConfirmEmailComponent.new(user: current_user)) %>
 ```
 
-_To assert that a component has been rendered or not, use `assert_component_rendered` / `refute_component_rendered` from `ViewComponent::TestHelpers`._
+_To assert whether a component has been rendered, use `assert_component_rendered` / `refute_component_rendered` from `ViewComponent::TestHelpers`._