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From: maart@cs.vu.nl (Maarten Litmaath)
Newsgroups: alt.sources
Subject: Re: Blank trimmer
Message-ID: <3086@solo6.cs.vu.nl>
Date: 28 Aug 89 22:49:05 GMT
References: <14602@bfmny0.UUCP>
Organization: V.U. Informatica, Amsterdam, the Netherlands
Lines: 27

tneff@bfmny0.UUCP (Tom Neff) writes:
\This is one of those nasty hacks purists get on your case for because
\you can do it all with sed(1).  [...]

Indeed!  Heh heh heh...
----------8<----------8<----------8<----------8<----------8<----------
#!/bin/sh

tab="	"

SED="
	s/[ $tab][ $tab]*$//
	/^$/{
		p
	: gap
		n
		s/[ $tab][ $tab]*$//
		/^$/b gap
	}
	p
"

sed -n "$SED" ${1+"$@"}
----------8<----------8<----------8<----------8<----------8<----------
-- 
C, the programming language that's the same |Maarten Litmaath @ VU Amsterdam:
         in all reference frames.           |maart@cs.vu.nl, mcvax!botter!maart