def onShortcutUnindentWithBackspace(self):
        """Backspace pressed, unindent
        """
        assert self._qpart.textBeforeCursor().endswith(self.text())

        charsToRemove = len(self._qpart.textBeforeCursor()) % len(self.text())
        if charsToRemove == 0:
            charsToRemove = len(self.text())

        cursor = self._qpart.textCursor()
        cursor.setPosition(cursor.position() - charsToRemove, QTextCursor.KeepAnchor)
        cursor.removeSelectedText()
def getUseageMessage(self):
        return ("- TECHORANGE -\n"
                "useage:\n"
                "index - download entry page of TECHORANGE \n"
                "tag - download not obtained tag page \n"
                "news [tag] - download not obtained news [of given tag] \n")