return "", s
	}
	return s[i+2 : j], s[:i]
}

func newSetextHeading(p *parseState, s line) (line, bool) {
	var n int
	peek := s
	if p.nextB() == p.para() && peek.trimSetext(&n) {
		p.closeBlock()
		para, ok := p.last().(*Paragraph)
		if !ok {
			return s, false
		}
		p.deleteLast()
		p.doneBlock(&Heading{Position{para.StartLine, p.lineno}, n, para.Text, ""})
		return line{}, true
	}

func (p *parseState) para() *paraBuilder {
	if b, ok := p.stack[len(p.stack)-1].builder.(*paraBuilder); ok {
		return b
	}
	return nil
}

func (p *parseState) closeBlock() Block {
	b := &p.stack[len(p.stack)-1]
	if b.builder == nil {
		println("closeBlock", len(p.stack)-1)
	}
	blk := b.builder.build(p)
	if list, ok := blk.(*List); ok {
		p.corner = p.corner || listCorner(list)
		if p.TaskListItems {

		}
		end = ">"
	}
	if end != "" {
		b := &htmlBuilder{endFunc: func(s string) bool { return strings.Contains(s, end) }}
		p.addBlock(b)
		b.text = append(b.text, s.string())
		if b.endFunc(t) {
			p.closeBlock()
		}
		return true
	}

	// case 6
	i := 1
	if i < len(t) && t[i] == '/' {
		i++
	}
	buf := make([]byte, 0, 16)
	for ; i < len(t) && len(buf) < 16; i++ {
		c := t[i]

e.preventDefault();tr.b.dispatchSimpleEvent(this,'closeclick');},onFocusIn_(e){let node=e.target;while(node){if(node===this){return;}
node=node.parentNode;}