Fix CentOS detection in regression get-os script

diff --git a/regress/scripts/get-os b/regress/scripts/get-os
index aaff2cd705e4ac0a900338f21b9bcd04033b6bec..b14b7880227ee2cd276768e8c1e16e766def806a 100755 (executable)
--- a/regress/scripts/get-os
+++ b/regress/scripts/get-os
@@ -385,7 +385,7 @@ then
        DISTNAME=redhat
 elif test -f /etc/redhat-release
 then
-       if test `grep -q CentOS /etc/redhat-release`
+       if grep -q CentOS /etc/redhat-release
        then
            DISTNAME=centos
        else