Fix whitespace

Author: wyuenho

src/body.js

@@ -69,7 +69,7 @@ var Body = Backgrid.Body = Backbone.View.extend({
         emptyText: this.emptyText,
         columns: this.columns
       });
-      
+
       this.rows.unshift(this.emptyRow);
       return true
     }
@@ -356,10 +356,10 @@ var Body = Backgrid.Body = Backbone.View.extend({
     var i = this.collection.indexOf(model);
     var j = this.columns.indexOf(column);
     var cell, renderable, editable, m, n;
-    
+
     // return if model being edited in a different grid
     if (j === -1) return this;
-    
+
     this.rows[i].cells[j].exitEditMode();
 
     if (command.moveUp() || command.moveDown() || command.moveLeft() ||