oops, <tt> went the way of the dodo, using <code>

IPython/html/static/notebook/js/quickhelp.js

@@ -65,7 +65,7 var IPython = (function (IPython) {
         var i, half, n;
 
         // Command mode
-        var cmd_div = $('<div/>').append($('<h4>Command Mode (press <tt>esc</tt> to enable)</h4>'));
+        var cmd_div = $('<div/>').append($('<h4>Command Mode (press <code>esc</code> to enable)</h4>'));
         var cmd_sub_div = $('<div/>').addClass('hbox');
         var cmd_col1 = $('<div/>').addClass('box-flex0');
         var cmd_col2 = $('<div/>').addClass('box-flex0');
@@ -98,7 +98,7 var IPython = (function (IPython) {
         var i, half, n;
 
         // Edit mode
-        var edit_div = $('<div/>').append($('<h4>Edit Mode (press <tt>enter</tt> to enable)</h4>'));
+        var edit_div = $('<div/>').append($('<h4>Edit Mode (press <code>enter</code> to enable)</h4>'));
         var edit_sub_div = $('<div/>').addClass('hbox');
         var edit_col1 = $('<div/>').addClass('box-flex0');
         var edit_col2 = $('<div/>').addClass('box-flex0');

IPython/html/static/notebook/js/tour.js

@@ -56,7 +56,7 var tour_steps = [
     title: "Edit Mode",
     placement: 'bottom',
     onShow: function(tour) { edit_mode(); },
-    content: "Pressing <tt>enter</tt> or clicking in the input text area of the cell switches to Edit Mode."
+    content: "Pressing <code>enter</code> or clicking in the input text area of the cell switches to Edit Mode."
   }, {
     element: '.selected',
     title: "Edit Mode",
@@ -68,7 +68,7 var tour_steps = [
     title: "Back to Command Mode",
     placement: 'bottom',
     onShow: function(tour) { IPython.notebook.command_mode(); },
-    content: "Pressing <tt>esc</tt> or clicking outside of the input text area takes you back to Command Mode."
+    content: "Pressing <code>esc</code> or clicking outside of the input text area takes you back to Command Mode."
   }, {
     element: '#keyboard_shortcuts',
     title: "Keyboard Shortcuts",