Ack -- this module mixes tabs and spaces, and what appears to be a mix

Ack -- this module mixes tabs and spaces, and what appears to be a mix
of 2-space and 4-space indents.  Whatever, when I saw the checkin diff it
was clear that what my editor thinks a tab means didn't match this module's
belief.  Removed all the tabs from the lines I added and changed, left
everything else alone.