[COOK-4619] - no way to unset recipient_delimiter

Signed-off-by: Sean OMeara <someara@opscode.com>

test/integration/default/serverspec/default_spec.rb

@@ -28,7 +28,7 @@ describe 'postfix::default' do
 
   context 'configures' do
     describe file('/etc/postfix/main.cf') do
-      its(:content) { should match /^# Generated by Chef for / }
+      its(:content) { should match(/^# Generated by Chef for /) }
     end
   end
 end