Title: The function is recursive
Goal: Generalize the function `f/1' by selecting the expression `2', the new parameter is `N'.
Parameters: [{file,"gen22.erl"},{posrange,{76,76}},{varname,"N"}].
Documentation:  There is not any variable with the name `N' in the body of `f/1', so it is possible to introduce a new variable and replace the subexpression `2' with that variable. This subexpression is added to the argument list of the function call `f([1,2], 2)' in the body of `g/0'. The body of `f/1' contain a recursive call, in this place the introduced new parameter is added to the argument list of the function call `f(Tail, N)'. 
