def cursorAtSpaceEnd(block):
            cursor = QTextCursor(block)
            cursor.setPosition(block.position() + len(blockIndentation(block)))
            return cursor
def execute_as(self, user):
        self.check_prereq(self.LOGGED_IN)
        self._exit_modes_beyond(self.LOGGED_IN)
        user.commandLine(self)
        user.login()
        self.modeList.append(user)
        return user