   end
 
   @doc """
-  Receives a list of tuples and replaces the item
-  identified by `key` at `position`. If the item
-  does not exist, it is added to the end of the list.
+  Receives a `list` of tuples and replaces the item
+  identified by `key` at `position`.
+
+  If the item does not exist, it is added to the end of the `list`.
 
   ## Examples
 

  end

  @doc """
  Receives a list of tuples and deletes the first tuple
  where the item at `position` matches the
  given `key`. Returns the new list.



  @doc """
  Wraps the argument in a list.

  If the argument is already a list, returns the list.
  If the argument is `nil`, returns an empty list.

