Stray error message

[schildwaechter]

When calling

puppet catalog diff --content_diff --show_resource_diff --render-as json old new

where old and new contain the pson-catalogs from old and new config, a stray error message

Error: Add --debug for realtime output, add --render-as {json,yaml} for parsed output

gets display.

The diff gets created fine.

[tuxinaut]

Same here :unamused: