On Thu, Jan 29, 2015 at 5:38 PM, Brad Jorsch (Anomie) <bjorsch@wikimedia.org
wrote:
Remove the marker. This loses whatever is inside the marker.
Just output an error, to make it obvious something stupid is going on.
Failing loud and early is generally a good idea, but if we don't want that, maybe replace the marker with STRIP-MARKER-WAS-REMOVED-SEE-BUG-12345? That at least gives a fighting chance to editors trying to debug why the template does not work as expected.