// Goldmark allows spaces here but the spec and the Dingus do not.
		p.corner = true
	}

	if _, j, ok := parseTagName(s, i+2); ok {
		j = skipSpace(s, j)
		if j < len(s) && s[j] == '>' {
			return &HTMLTag{s[i : j+1]}, j + 1, true
		}
	}
	return nil, 0, false
}

func parseTagName(s string, i int) (string, int, bool) {