Title: Select a pattern
Goal: Generalize the function `f/1' by selecting the expression `List2', the a new parameter is `F'.
Parameters: [{file,"gen13.erl"},{posrange,{78,82}},{varname,"F"}].
Documentation: The selected expression is a pattern, in that case we should replace the pattern with an application, which result in a syntactical incorrect source, so the refactoring refuse to perform this transformation.
