 		XCTAssertEqual(list.count, 2)
 		XCTAssertEqual(list[1], 9)
 		XCTAssertEqual(list.last, 9)
-    }
+	}
 	
 	func testInsert() {
 		XCTAssertTrue(list.isEmpty)

		XCTAssertNil(list[4])
	}
	
}

//

import XCTest
@testable import LinkedList

class LinkedListTests: XCTestCase {
    
	private let list = DoublyLinkedList<Int>()
	
	func testAppend() {
		XCTAssertTrue(list.isEmpty)
		
		list.append(value: 5)
