Fix ex-em span references that were missed earlier.

Author: dpvc

unpacked/jax/output/HTML-CSS/autoload/maction.js

@@ -178,13 +178,13 @@ MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function () {
       //
       //  get em sizes (taken from HTMLCSS.preTranslate)
       //
-      var emex = tip.insertBefore(HTMLCSS.EmExSpan.cloneNode(true),tip.firstChild);
-      var ex = emex.firstChild.offsetHeight/60,
-          em = emex.lastChild.firstChild.offsetHeight/60;
+      var emex = tip.insertBefore(HTMLCSS.TestSpan.cloneNode(true),tip.firstChild);
+      var ex = emex.childNodes[1].offsetHeight/60,
+          em = emex.childNodes[2].offsetHeight/60;
+      emex.parentNode.removeChild(emex);
       HTMLCSS.em = HTMLCSS.outerEm = MML.mbase.prototype.em = em;
       var scale = Math.floor(Math.max(HTMLCSS.config.minScaleAdjust/100,(ex/HTMLCSS.TeX.x_height)/em) * HTMLCSS.config.scale);
       tip.firstChild.style.fontSize = scale+"%";
-      emex.parentNode.removeChild(emex);
 
       var stack = HTMLCSS.createStack(tip.firstChild.firstChild);
       var box = HTMLCSS.createBox(stack);

unpacked/jax/output/HTML-CSS/jax.js

@@ -869,8 +869,8 @@
       //
       //  get em sizes (taken from HTMLCSS.preTranslate)
       //
-      var emex = span.appendChild(this.EmExSpan.cloneNode(true));
-      var em = emex.lastChild.firstChild.offsetHeight/60;
+      var emex = span.appendChild(this.TestSpan.cloneNode(true));
+      var em = emex.childNodes[2].offsetHeight/60;
       this.em = MML.mbase.prototype.em = em;
       this.outerEm = em / jax.HTMLCSS.scale;
       emex.parentNode.removeChild(emex);

unpacked/jax/output/SVG/jax.js

@@ -493,8 +493,8 @@
       //
       //  get em size (taken from this.preTranslate)
       //
-      var emex = span.appendChild(this.ExSpan.cloneNode(true));
-      var ex = emex.firstChild.offsetHeight/60;
+      var emex = span.appendChild(this.TestSpan.cloneNode(true));
+      var ex = emex.childNodes[1].offsetHeight/60;
       this.em = MML.mbase.prototype.em = ex / SVG.TeX.x_height * 1000; this.ex = ex;
       this.linebreakWidth = jax.SVG.lineWidth; this.cwidth = jax.SVG.cwidth;
       emex.parentNode.removeChild(emex);