Avoid printing removed lines unless necessary; avoid version headers.

diff --git a/convert b/convert
index eb1ca3c46772a8fb2b53eeed71428683bd81c515..7541ff12c258bc65ce3c53e71115103a09e4bd23 100755 (executable)
--- a/convert
+++ b/convert
@@ -93,7 +93,8 @@ perl -ne '
                $out .= $_;
        END {
                if ($out =~ m/^\@\@/s &&
-                   $out =~ m/^(?:\+ )?[^\@ ].*\w.*$/m) {
+                   ($out =~ m/^\+(?!u?adns).*\w.*$/m ||
+                    $out =~ m/^\-(?!u?adns).*\w.*$/m)) {
                        print $&, "\n\n" or die $!;
                }
                print $out or die $!;