Reinsert the killed word.

def reverseCommit(self):
        """
        Reinsert the killed word.
        """
        if self.selectionPosOld is None:
            return

        # Shorthand.
        wid = self.qteWidget

        # Select, backup, and delete the selection.
        wid.setSelection(*self.selectionPosNew)
        self.baseClass.replaceSelectedText(self.oldText)

        # Add the styling information.
        line, col = self.selectionPosNew[0:2]
        wid.SCISetStylingEx(line, col, self.oldStyle)
        wid.setCursorPosition(line, col)