func Render(doc []byte) []byte {
	renderer := NewRoffRenderer()
	return blackfriday.Run(doc,
		[]blackfriday.Option{blackfriday.WithRenderer(renderer),
			blackfriday.WithExtensions(renderer.GetExtensions())}...)
}
Render converts a markdown document into a roff formatted document.
package md2man
import (
	"github.com/russross/blackfriday/v2"
)