remove trailing whitespaces ❤️

spec/controllers/admin/export_controller_spec.rb

@@ -4,7 +4,7 @@ describe Admin::ExportController do
   it "is a subclass of AdminController" do
     (Admin::ExportController < Admin::AdminController).should be_true
   end
-  
+
   context 'while logged in as an admin' do
     before do
       @user = log_in(:admin)
@@ -54,4 +54,4 @@ describe Admin::ExportController do
       end
     end
   end
-end
+end