Fixed range based for loop

set.go

@@ -1,6 +1,5 @@
 package dnsexit_manager
 
-
 type Set struct {
 	elements map[interface{}]struct{}
 }
@@ -14,7 +13,7 @@ func CreateSet() *Set {
 func (set *Set) Add(value interface{}) {
 	_, found := set.elements[value]
 
-  if !found{
+	if !found {
 		set.elements[value] = struct{}{}
 	}
 }
@@ -25,7 +24,7 @@ func (set *Set) Delete(value interface{}) {
 
 func (set *Set) List() []interface{} {
 	keys := make([]interface{}, 0, len(set.elements))
-  for key := range set.elements {
+	for _, key := range set.elements {
 		keys = append(keys, key)
 	}