formatting

lib/single-file/single-file-browser.js

@@ -149,12 +149,15 @@ this.SingleFile = this.SingleFile || (() => {
 		static getCanvasData(doc) {
 			return docHelper.getCanvasData(doc);
 		}
+
 		static winIdAttributeName() {
 			return docHelper.WIN_ID_ATTRIBUTE_NAME;
 		}
+
 		static preservedSpaceAttributeName() {
 			return docHelper.PRESERVED_SPACE_ELEMENT_ATTRIBUTE_NAME;
 		}
+		
 		static removedContentAttributeName() {
 			return docHelper.REMOVED_CONTENT_ATTRIBUTE_NAME;
 		}