Minor

Functional Programming/Function Types/Exercise 3/task.md

@@ -8,4 +8,4 @@ Note the generic types `R?` (in `(Int, T) -> R?`) and `List<R>`. `R?` means the
 lambda's return type is nullable. `mapIndexNotNull()` returns a list of
 non-nullable elements, so the function return type is `List<R>`. To express
 that `R` is a non-nullable type, we specify the constraint on a generic type
-parameter `R : Any`. Type constraints will be covered in [Generics].
+parameter `R : Any`. Type constraints will be covered in [More about Generics].