Print a summary of the form.

        May help finding which fields need to be filled-in.

def print_summary(self):
        """Print a summary of the form.

        May help finding which fields need to be filled-in.
        """
        for input in self.form.find_all(
                ("input", "textarea", "select", "button")):
            input_copy = copy.copy(input)
            # Text between the opening tag and the closing tag often
            # contains a lot of spaces that we don't want here.
            for subtag in input_copy.find_all() + [input_copy]:
                if subtag.string:
                    subtag.string = subtag.string.strip()
            print(input_copy)