don't process disabled scripts

lib/single-file/single-file-helper.js

@@ -111,7 +111,7 @@ this.singlefile.lib.helper = this.singlefile.lib.helper || (() => {
 	}
 
 	function preProcessDoc(doc, win, options) {
-		doc.querySelectorAll("noscript").forEach(element => {
+		doc.querySelectorAll("noscript:not([" + DISABLED_NOSCRIPT_ATTRIBUTE_NAME + "])").forEach(element => {
 			element.setAttribute(DISABLED_NOSCRIPT_ATTRIBUTE_NAME, element.textContent);
 			element.textContent = "";
 		});