all: gofmt

Run standard gofmt command on project root.

- go version go1.10.3 darwin/amd64

Signed-off-by: ia <isaac.ardis@gmail.com>

lists/arraylist/arraylist.go

@@ -110,6 +110,7 @@ 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

@@ -185,6 +185,7 @@ 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

@@ -166,6 +166,7 @@ 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