Fixed bug in depot spec generation.
Fixed a bug in the DEPOT action where the generated depot
spec had a 'Type:' field with only a single newline rather
than a double-newline.
I suspect this will fix spurious failures reported by
Adrian Waters where there was an error related to the
StreamDepth field, which this script doesn't interact with.
It's not clear why the failure was only spurious, but this
should put an end to it once and for all.