Title: The name of the function with its arity increased by one is imported in the module
Goal: Generalize the function `double/1' by selecting the number `2', the new parameter is `N'.
Parameters: [{file,"gen5.erl"},{posrange,{77,77}},{varname,"N"}].
Documentation: The result of the transformation would be the function `double/2', but `double/2' is imported from module `mod', so the name collision makes the refactoring invalid.
