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diff --git a/js/mathjax/jax/output/CommonHTML/autoload/annotation-xml.js b/js/mathjax/jax/output/CommonHTML/autoload/annotation-xml.js
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+// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0
+/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+
+/*************************************************************
+ *
+ *  MathJax/jax/output/CommonHTML/autoload/annotation-xm;l.js
+ *  
+ *  Implements the CommonHTML output for <annotation-xml> elements.
+ *
+ *  ---------------------------------------------------------------------
+ *  
+ *  Copyright (c) 2015-2020 The MathJax Consortium
+ * 
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+MathJax.Hub.Register.StartupHook("CommonHTML Jax Ready",function () {
+  var VERSION = "2.7.9";
+  var MML = MathJax.ElementJax.mml,
+      CHTML = MathJax.OutputJax.CommonHTML;
+
+  MML["annotation-xml"].Augment({
+    toCommonHTML: function (node) {
+      var encoding = this.Get("encoding");
+      node = this.CHTMLdefaultNode(node,{childOptions:{encoding:encoding}});
+      if (this.CHTML.rscale !== 1) this.CHTML.rescale(1/this.CHTML.rscale);
+      return node;
+    }
+  });
+  
+  MML.xml.Augment({
+    toCommonHTML: function (node,options) {
+      var bbox = this.CHTML = CHTML.BBOX.zero();
+      for (var i = 0, m = this.data.length; i < m; i++) 
+        {node.appendChild(this.data[i].cloneNode(true))}
+      //
+      //  Warning: causes reflow
+      //
+      var w = node.offsetWidth, h = node.offsetHeight;
+      var strut = CHTML.addElement(node,"mjx-hd-test",{style:{height:h+"px"}});
+      bbox.d = bbox.b = (node.offsetHeight - h)/CHTML.em;
+      bbox.w = bbox.r = w/CHTML.em; bbox.h = bbox.t = h/CHTML.em - bbox.d;
+      node.removeChild(strut);
+    }
+  });
+  
+  MathJax.Hub.Startup.signal.Post("CommonHTML annotation-xml Ready");
+  MathJax.Ajax.loadComplete(CHTML.autoloadDir+"/annotation-xml.js");
+});
+
+// @license-end