slight typography changes

IPython/frontend/html/notebook/static/less/notebook.less

@@ -332,7 +332,7 div.text_cell_input {
 }
 
 div.text_cell_render {
-    font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
+    /*font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;*/
     outline: none;
     resize: none;
     width:  inherit;

IPython/frontend/html/notebook/static/less/renderedhtml.less

@@ -58,6 +58,10
     border: 1px solid black;
 }    
 
+.rendered_html p {
+    text-align: justify;
+}
+
 .rendered_html p + p {
     margin-top: 1em;
 }