From: David Levine <levinedl@acm.org>
Date: Sun, 8 Dec 2013 18:15:18 +0000 (-0600)
Subject: Try this sed command for squeeze_lines().
X-Git-Url: https://diplodocus.org/git/nmh/commitdiff_plain/c5515a353e7316cb1c2ba3d4dce2979d5779ce37?hp=4929cad323afc87404752a1e88664a7f42cbb737

Try this sed command for squeeze_lines().
---

diff --git a/test/common.sh.in b/test/common.sh.in
index 94b41906..8f5d576c 100644
--- a/test/common.sh.in
+++ b/test/common.sh.in
@@ -126,11 +126,11 @@ check_for_hard_links () {
   set -e
 }
 
-#### Filter that squeezes blank lines, emulating GNU cat -s.
+#### Filter that squeezes blank lines, partially emulating GNU cat -s,
+#### but sufficient for our purpose.
+#### From http://www-rohan.sdsu.edu/doc/sed.html, compiled by Eric Pement.
 squeeze_lines() {
-  awk 'length($0) == 0 && e == 1 { next }
-          { e = length($0) == 0 }
-          { print }'
+  sed '/^$/N;/\n$/D'
 }
 
 #### Filter that inserts initial whitespace and converts non-breakable