def set_diff_against(self, obj):
        assert self.supports_diffing

        self.diff_against_obj = obj
Relative position for cursor_right.
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/reviews/ui/base.py/ReviewUI.set_diff_against--crossover with--dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/document.py/Document.get_cursor_right_position