Revert "gofmt"

lists/arraylist/arraylist.go

@@ -110,7 +110,6 @@ func (list *List) IndexOf(value interface{}) int {
 		}
 		return -1
 }
-
 // Empty returns true if list does not contain any elements.
 func (list *List) Empty() bool {
 	return list.size == 0

lists/doublylinkedlist/doublylinkedlist.go

@@ -185,7 +185,6 @@ func (list *List) IndexOf(value interface{}) int {
 	}
 	return -1
 }
-
 // Empty returns true if list does not contain any elements.
 func (list *List) Empty() bool {
 	return list.size == 0

lists/singlylinkedlist/singlylinkedlist.go

@@ -166,7 +166,6 @@ func (list *List) IndexOf(value interface{}) int {
 	}
 	return -1
 }
-
 // Empty returns true if list does not contain any elements.
 func (list *List) Empty() bool {
 	return list.size == 0