formatted code

lib/single-file/doc-helper.js

@@ -33,7 +33,7 @@ this.docHelper = this.docHelper || (() => {
 	const IGNORED_REMOVED_TAG_NAMES = ["NOSCRIPT", "DISABLED-NOSCRIPT", "META", "LINK", "STYLE", "TITLE", "TEMPLATE", "SOURCE", "OBJECT"];
 	const MASK_TAGNAME = "singlefile-mask";
 	const BACKDROP_THRESHOLD_SIZE = .95;
-	const BACKDROP_THRESHOLD_ZINDEX = 999
+	const BACKDROP_THRESHOLD_ZINDEX = 999;
 
 	return {
 		preProcessDoc,