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diff --git a/js/mathjax/jax/element/mml/optable/GeneralPunctuation.js b/js/mathjax/jax/element/mml/optable/GeneralPunctuation.js
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+// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0
+/*************************************************************
+ *
+ *  MathJax/jax/output/HTML-CSS/optable/GeneralPunctuation.js
+ *
+ *  Copyright (c) 2010-2020 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.
+ *
+ */
+
+(function (MML) {
+  var MO = MML.mo.OPTYPES;
+  var TEXCLASS = MML.TEXCLASS;
+
+  MathJax.Hub.Insert(MML.mo.prototype,{
+    OPTABLE: {
+      prefix: {
+        '\u2016': [0,0,TEXCLASS.ORD,{fence: true, stretchy: true}], // double vertical line
+        '\u2018': [0,0,TEXCLASS.OPEN,{fence: true}], // left single quotation mark
+        '\u201C': [0,0,TEXCLASS.OPEN,{fence: true}]  // left double quotation mark
+      },
+      postfix: {
+        '\u2016': [0,0,TEXCLASS.ORD,{fence: true, stretchy: true}], // double vertical line
+        '\u2019': [0,0,TEXCLASS.CLOSE,{fence: true}], // right single quotation mark
+        '\u201D': [0,0,TEXCLASS.CLOSE,{fence: true}]  // right double quotation mark
+      }
+    }
+  });
+
+  MathJax.Ajax.loadComplete(MML.optableDir+"/GeneralPunctuation.js");
+
+})(MathJax.ElementJax.mml);
+// @license-end