Update QidianParser.js

Swapped single quote to double quote

Optimize QidianParser.js for smaller files.

Cleanup output html data, removing unnecessary elements and frivolous metadata. Chapters are visibly the same, but content length reduced by around 50% on average.

plugin/js/parsers/QidianParser.js

@@ -46,6 +46,7 @@ class QidianParser extends Parser{
     preprocessRawDom(webPage) {
         let content = this.findContent(webPage);
         if (content !== null) {
+            content = this.cleanRawDom(content);
             return;
         }
         let json = this.findChapterContentJson(webPage);
@@ -72,6 +73,14 @@ class QidianParser extends Parser{
         }
     }
 
+    cleanRawDom(content)
+    {
+        //Remove repeating & unused metadata from document. Approximately halves body length.
+        content.querySelectorAll("i.para-comment_num, i.para-comment").forEach(i => i.remove());
+        content.querySelectorAll("div.db").forEach(i => i.removeAttribute("data-ejs"));
+        return content;
+    }
+
     findChapterContentJson(dom) {
         const searchString = "var chapInfo=";
         return [...dom.querySelectorAll("script")]