Compilation error after applying the Inline method refactoring

[jonhnanthan]

Rope causes a compilation error after modifying the loop inside the return using the inlined method.
It would be nice if Rope sent a warning to the user that the method has an empty body.

Steps to reproduce the behavior:

1. Code before refactoring:

class MyTokenizer:

    def tokenize(self, text):
        return

    def itokenize(self, text):
        return (t for t in self.tokenize(text))

2. Apply the Inline Method to MyTokenizer.tokenize();