def back(self, n=1):
        self._traverse(-1 * n)
Return an index relative to the cursor position pointing to the start
dataset/ETHPy150Open jmcarp/robobrowser/robobrowser/browser.py/RoboBrowser.back--crossover with--dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/document.py/Document.find_start_of_previous_word