From 716a9cf0d5a8a760e0122ffec214573a06b8896f Mon Sep 17 00:00:00 2001
From: "Jessica B. Hamrick" <jhamrick@berkeley.edu>
Date: Wed, 28 Oct 2015 12:35:13 -0700
Subject: [PATCH] Don't add explicit mark unless asked to

---
 notebook/static/notebook/js/notebook.js | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/notebook/static/notebook/js/notebook.js b/notebook/static/notebook/js/notebook.js
index 208b1c24d..1f0a0d939 100644
--- a/notebook/static/notebook/js/notebook.js
+++ b/notebook/static/notebook/js/notebook.js
@@ -719,16 +719,13 @@ define(function (require) {
      * @param {number} offset
      */
     Notebook.prototype.extend_marked = function(offset) {
-                
         // Mark currently selected cell
         this.get_selected_cell().marked = true;
-        
+
         // Select the cell in the offset direction.  Bound index between 0 and
         // the number of cells -1.
         var selectedIndex = Math.min(Math.max(this.get_selected_index() + offset, 0), this.ncells()-1);
         this.select(selectedIndex);
-        this.get_selected_cell().marked = true;
-
         this.ensure_focused();
     };