Merge pull request #6160 from parleur/patch-2

Span in CellToolBar instead of div

IPython/html/static/notebook/js/celltoolbar.js

@@ -342,7 +342,7 define([
                         setter(cell, !v);
                         chkb.attr("checked", !v);
             });
-            button_container.append($('<div/>').append(lbl));
+            button_container.append($('<span/>').append(lbl));
         };
     };
 
@@ -406,7 +406,7 define([
             select.change(function(){
                         setter(cell, select.val());
                     });
-            button_container.append($('<div/>').append(lbl).append(select));
+            button_container.append($('<span/>').append(lbl).append(select));
         };
     };