Noissue - Compare individual characters instead of substring

lib/matcher.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 104 matching lines @@
     let {text} = filter;
     if (Filter.regexpRegExp.test(text))
       return result;
 
     // Remove options
     let match = Filter.optionsRegExp.exec(text);
     if (match)
       text = match.input.substr(0, match.index);
 
     // Remove whitelist marker
-    if (text.substr(0, 2) == "@@")
+    if (text[0] == "@" && text[1] == "@")
       text = text.substr(2);
 
     let candidates = text.toLowerCase().match(
       /[^a-z0-9%*][a-z0-9%]{3,}(?=[^a-z0-9%*])/g
     );
     if (!candidates)
       return result;
 
     let hash = this.filterByKeyword;
     let resultCount = 0xFFFFFF;
@@ skipping 288 matching lines @@
 
     return result;
   }
 };
 
 /**
  * Shared CombinedMatcher instance that should usually be used.
  * @type {CombinedMatcher}
  */
 exports.defaultMatcher = new CombinedMatcher();