Title: Select expressions which bind variables and cause name conflict
Goal: Generalize the function `f/1' by selecting the expressions `M = N*2, M', the a new parameter is `F'.
Parameters: [{file,"gen11.erl"},{posrange,{51,62}},{varname,"F"}].
Documentation: The selection contains variables (`N', `M'), so a new fun expression should create and add to every call of the function, but the bound variable `M' introduce a name conflict in the scope of the function call (in the body of `h/1'), so the refactoring denied the transformation.
