       iex> get_in(users, ["josé", :age])
       27
 
-  In case any of entries in the middle return nil, nil will be returned
+  In case any of entries in the middle returns `nil`, `nil` will be returned
   as per the Access protocol:
 
       iex> users = %{"josé" => %{age: 27}, "ericmj" => %{age: 23}}

      iex> update_in(users, ["josé", :age], &(&1 + 1))
      %{"josé" => %{age: 28}, "ericmj" => %{age: 23}}

  In case any of entries in the middle return nil, a map is dynamically
  created:

      iex> users = %{"josé" => %{age: 27}, "ericmj" => %{age: 23}}

      iex> put_in(users, ["josé", :age], 28)
      %{"josé" => %{age: 28}, "ericmj" => %{age: 23}}

  In case any of entries in the middle returns `nil`, a map is dynamically
  created:

      iex> users = %{"josé" => %{age: 27}, "ericmj" => %{age: 23}}
