That didn't work, so try this awk command from Robert Elz.

diff --git a/test/common.sh.in b/test/common.sh.in
index 49e1c48..94b4190 100644 (file)
--- a/test/common.sh.in
+++ b/test/common.sh.in
@@ -128,7 +128,9 @@ check_for_hard_links () {
 
 #### Filter that squeezes blank lines, emulating GNU cat -s.
 squeeze_lines() {
 
 #### Filter that squeezes blank lines, emulating GNU cat -s.
 squeeze_lines() {

-  awk '!length() && e {next} {e = !length()} 1'
+  awk 'length($0) == 0 && e == 1 { next }
+          { e = length($0) == 0 }
+          { print }'

 }
 
 #### Filter that inserts initial whitespace and converts non-breakable
 }
 
 #### Filter that inserts initial whitespace and converts non-breakable