replace string with const

nucleus/util/path_traversal.go

@@ -103,7 +103,7 @@ func appendix(c chan string, stop chan bool,p chan []string) {
 
 func stringBuilder(ch chan string, b *strings.Builder, v *PathElement) {
 	if b.Len() == 0 {
-		b.WriteString("/")
+		b.WriteString(DELIM)
 	}
 	b.WriteString(v.Name)
 	if v.Children != nil {