diff --git a/IPython/html/static/widgets/js/widget_link.js b/IPython/html/static/widgets/js/widget_link.js
index c6571c0..7ee00d4 100644
--- a/IPython/html/static/widgets/js/widget_link.js
+++ b/IPython/html/static/widgets/js/widget_link.js
@@ -9,9 +9,9 @@ define([
         initialize: function() {
             this.on("change:widgets", function(model, value, options) {
                 this.update_bindings(model.previous("widgets") || [], value);
-				this.update_value(this.get("widgets")[0]);
+                this.update_value(this.get("widgets")[0]);
             }, this);
-	        this.on("destroy", function(model, collection, options) {
+            this.on("destroy", function(model, collection, options) {
                 this.update_bindings(this.get("widgets"), []);
             }, this);
         },
@@ -19,12 +19,12 @@ define([
             var that = this;
             _.each(oldlist, function(elt) {elt[0].off("change:" + elt[1], null, that);});
             _.each(newlist, function(elt) {elt[0].on("change:" + elt[1],
-						     function(model, value, options) {
-							     that.update_value(elt);
-						     }, that);
-					   // TODO: register for any destruction handlers
-					   // to take an item out of the list
-					  });
+                                                     function(model, value, options) {
+                                                         that.update_value(elt);
+                                                     }, that);
+                                           // TODO: register for any destruction handlers
+                                           // to take an item out of the list
+                                          });
         },
         update_value: function(elt) {
             if (this.updating) {return;}
@@ -34,10 +34,10 @@ define([
             this.updating = true;
             _.each(_.without(this.get("widgets"), elt),
                    function(element, index, list) {
-						if (element[0]) {
-							element[0].set(element[1], new_value);
-							element[0].save_changes();
-						}
+                       if (element[0]) {
+                           element[0].set(element[1], new_value);
+                           element[0].save_changes();
+                       }
                    }, this);
             this.updating = false;
         },
@@ -57,7 +57,7 @@ define([
                 this.source[0].off("change:" + this.source[1], null, this);
             }
             this.source = this.get("source");
-			if (this.source) {
+            if (this.source) {
                 this.source[0].on("change:" + this.source[1], function() { this.update_value(this.source); }, this);
                 this.update_value(this.source);
             }
@@ -70,16 +70,15 @@ define([
             this.updating = true;
             _.each(this.get("targets"),
                    function(element, index, list) {
-						if (element[0]) {
-							element[0].set(element[1], new_value);
-							element[0].save_changes();
-                        }
+                       if (element[0]) {
+                           element[0].set(element[1], new_value);
+                           element[0].save_changes();
+                       }
                    }, this);
             this.updating = false;
         },
     });
 
-
     return {
         "LinkModel": LinkModel,
         "DirectionalLinkModel": DirectionalLinkModel,