fixes #102 - add deterministic keyword

Author: PhilippSalvisberg

docs/4-language-usage/2-variables-and-types/2-numeric-data-types/g-2230.md

@@ -20,7 +20,7 @@ With ORACLE 11g, the new data type `simple_integer` has been introduced. It is a
 create or replace package body constants_up is
    co_big_increase constant number(5,0) := 1;
 
-   function big_increase return number is
+   function big_increase return number deterministic is
    begin
       return co_big_increase;
    end big_increase;
@@ -34,7 +34,7 @@ end constants_up;
 create or replace package body constants_up is
    co_big_increase constant simple_integer := 1;
 
-   function big_increase return simple_integer is
+   function big_increase return simple_integer deterministic is
    begin
       return co_big_increase;
    end big_increase;