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-rwxr-xr-xregress/regress.pl1
1 files changed, 1 insertions, 0 deletions
diff --git a/regress/regress.pl b/regress/regress.pl
index b9fb849b..dd79eb0c 100755
--- a/regress/regress.pl
+++ b/regress/regress.pl
@@ -27,6 +27,7 @@ use IPC::Open3 qw(open3);
# Define this at one place such that it can easily be changed
# if diff(1) does not support the -a option.
my @diff = qw(diff -au);
+system @diff, '/dev/null', '/dev/null' and @diff = qw(diff -u);
# --- utility functions ------------------------------------------------