ssert_approx_equals(spaceBeforeElement(element), 0, epsilon);
           }, `${tag} (not embellished operator)`);

           test(function() {
               assert_true(MathMLFeatureDetection.has_operator_spacing());
               var element = document.getElementsByTagName(tag)[3];
               assert_approx_equals(spaceBeforeElement(element), 0, epsilon);
           }, `${tag} (not embellished operator, from in-flow children)`);
      });
      done();
  }
</script>
</head>
<body>
  <div id="log"></d