[comp.editors] Need help with multiline SED script

new@udel.EDU (Darren New) (06/02/90)

Hi!  I'm trying to get sed to patch up the output from a program
generator. What I need to do is to delete any periods that are
on a line by themselves ONLY IF the previous line does not end
with a period.  I've tried

/.*\.\n[ \t]*\.$/{P;d}
# and people talk about TECO looking like line noise!

but this does not seem to ever match.  Am I missing some magic
here?  It's not really a problem, as the number of times I have
to go back in to add misdeleted periods is minor, but I thought
I should know this for the future.   Thanks in advance!
			-- Darren