Fix issues found by nlreturn linter

pkg/out/flat.go

@@ -23,6 +23,7 @@ func (p *FlatPrinter) Print(repos []Printable) string {
 
 		if len(repo.Errors()) > 0 {
 			str.WriteString(" " + red("error") + "\n")
+
 			continue
 		}
 

pkg/out/tree.go

@@ -216,6 +216,7 @@ func (n *Node) isYoungest() bool {
 	for i, sis := range sisters {
 		if sis.val == n.val {
 			myIndex = i
+
 			break
 		}
 	}