Say hold where the prose still said draws

holdset.go

@@ -25,7 +25,7 @@ func newHoldSet(s *session) holdSet {
 	return holdSet{unnamed: hold{variant: map[string]node{}, value: map[string]draw{}, s: s}}
 }
 
-// renderOnce renders n as one render, over draws of its own.
+// renderOnce renders n as one render, over a hold set of its own.
 func renderOnce(s *session, n node) string {
 	set := holdSet{unnamed: hold{s: s}}
 	return render(s, n, renderScope{set: &set})