fixed macro latex string

app/controllers/home.controller.js

             $scope.addMacro("<", "&#60; ");
             $scope.addMacro(">", "&#62;");
             $scope.addMacro("\\\'{E}", "&#201;");
-            $scope.addMacro("\\\'{A}", "&#192;");
+            $scope.addMacro("\\`{A}", "&#192;");
     }]);