Fixing comments on equation justification.

IPython/html/static/notebook/js/mathjaxutils.js

@@ -25,7 +25,9 @@ IPython.mathjaxutils = (function (IPython) {
                     processEscapes: true,
                     processEnvironments: true
                 },
-                displayAlign: 'center', // Change this to 'center' to center equations.
+                // Center justify equations in code and markdown cells. Elsewhere
+                // we use CSS to left justify single line equations in code cells.
+                displayAlign: 'center',
                 "HTML-CSS": {
                     styles: {'.MathJax_Display': {"margin": 0}}
                 }

IPython/html/static/notebook/less/outputarea.less

@@ -12,7 +12,6 @@ div.output_area {
     .rendered_html {
         // Inside a CodeCell, elements are left justified
         table {
-            // Center tables horizontally
             margin-left: 0;
             margin-right: 0;
         }