Fix lint issues.

Mac/MainWindow/ArticleExtractorButton.swift

@@ -16,9 +16,9 @@ enum ArticleExtractorButtonState {
 }
 
 class ArticleExtractorButton: NSButton {
-	
+
 	private var animatedLayer: CALayer?
-	
+
 	var buttonState: ArticleExtractorButtonState = .off {
 		didSet {
 			if buttonState != oldValue {
@@ -39,7 +39,7 @@ class ArticleExtractorButton: NSButton {
 			}
 		}
 	}
-	
+
 	override func accessibilityLabel() -> String? {
 		switch buttonState {
 		case .error:
@@ -57,12 +57,12 @@ class ArticleExtractorButton: NSButton {
 		super.init(frame: frameRect)
 		commonInit()
 	}
-	
+
 	required init?(coder: NSCoder) {
 		super.init(coder: coder)
 		commonInit()
 	}
-	
+
 	private func commonInit() {
 		wantsLayer = true
 		bezelStyle = .texturedRounded
@@ -70,7 +70,7 @@ class ArticleExtractorButton: NSButton {
 		imageScaling = .scaleProportionallyDown
 		widthAnchor.constraint(equalTo: heightAnchor).isActive = true
 	}
-	
+
 	override func layout() {
 		super.layout()
 		guard case .animated = buttonState else {
@@ -79,31 +79,31 @@ class ArticleExtractorButton: NSButton {
 		stripAnimatedSublayer()
 		addAnimatedSublayer(to: layer!)
 	}
-	
+
 	private func stripAnimatedSublayer() {
 		animatedLayer?.removeFromSuperlayer()
 	}
-	
+
 	private func addAnimatedSublayer(to hostedLayer: CALayer) {
 		let image1 = AppAssets.articleExtractorOff.tinted(with: NSColor.controlTextColor)
 		let image2 = AppAssets.articleExtractorOn.tinted(with: NSColor.controlTextColor)
 		let images = [image1, image2, image1]
-		
+
 		animatedLayer = CALayer()
 		let imageSize = AppAssets.articleExtractorOff.size
 		animatedLayer!.bounds = CGRect(x: 0, y: 0, width: imageSize.width, height: imageSize.height)
 		animatedLayer!.position = CGPoint(x: bounds.midX, y: bounds.midY)
-		
+
 		hostedLayer.addSublayer(animatedLayer!)
-		
+
 		let animation = CAKeyframeAnimation(keyPath: "contents")
 		animation.calculationMode = CAAnimationCalculationMode.linear
 		animation.keyTimes = [0, 0.5, 1]
 		animation.duration = 2
 		animation.values = images
 		animation.repeatCount = HUGE
-		
+
 		animatedLayer!.add(animation, forKey: "contents")
 	}
-	
+
 }