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diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/js_checker/pattern_utils.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/js_checker/pattern_utils.js
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+/**
+ * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
+ * *
+ * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see  <http://www.gnu.org/licenses/>.
+ *
+ */
+
+exports.patternUtils = {
+  /**
+   * removeNonalpha
+   *
+   * Remove all nonalphanumeric values, except for
+   * < and >, since they are what we use for tokens.
+   *
+   */
+  removeNonalpha: function (str) {
+	  var regex = /[^a-z0-9<>@]+/gi;
+	  return str.replace(regex, '');
+  },
+  removeWhitespace: function (str) {
+	  return str.replace(/[ \t\r\n]+/gmi,"");
+  },
+  replaceTokens: function (str) {
+	  var regex = /<.*?>/gi;
+	  return str.replace(regex, '.*?');
+  }
+};
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