Highlight the scope of the current caret position.

        This get called only if :attr:`
        spyder.widgets.panels.FoldingPanel.highlight_care_scope` is True.

def _highlight_caret_scope(self):
        """
        Highlight the scope of the current caret position.

        This get called only if :attr:`
        spyder.widgets.panels.FoldingPanel.highlight_care_scope` is True.
        """
        cursor = self.editor.textCursor()
        block_nbr = cursor.blockNumber()
        if self._block_nbr != block_nbr:
            block = FoldScope.find_parent_scope(
                self.editor.textCursor().block())
            try:
                s = FoldScope(block)
            except ValueError:
                self._clear_scope_decos()
            else:
                self._mouse_over_line = block.blockNumber()
                if TextBlockHelper.is_fold_trigger(block):
                    self._highlight_block(block)
        self._block_nbr = block_nbr