Fix skin depth justification in tooltip

magloop.html

@@ -1901,7 +1901,7 @@
                                     } else 
                                     if(label[0] == 'S'){
                                         var num = getMetricPrefix(value * 1e-6);
-                                        label = justifyText("Skin depth: ", num.val.toPrecision(3).toString() + '   ' + num.pfx + 'm');
+                                        label = justifyText("Skin depth: ", num.val.toPrecision(3).toString() + '  ' + num.pfx + 'm');
                                     } else {
                                         label += value.toFixed(3).toString();
                                     }