 	}
 	
 	@IBOutlet weak var outputView: WKWebView?
+	
+	// MARK: - standard overrides
 	
 	override func viewDidLoad() {
 		super.viewDidLoad()

		return string
	}
	
	private func ensureResourcesLoaded() {
		guard didLoadView else { return }
		resourcesExtracted = true
		loadInitialPage()
//		guard let tarball = Bundle.main.url(forResource: "previewResources", withExtension: "tgz"), tarball.fileExists()
//			else { fatalError("failed to find previewResources in app bundle")
//		}

		outputView?.navigationDelegate = self
	}
	
	// MARK: - notification handlers
	
	/// called by the editor when the user has made an edit, resulting in a change of what is displayed
	///
	/// - Parameters:
