admin: improve minimum version text

"inboxes 1 inboxes not supported by ..." was non-sensical.
Now it'll show "-V1 inbox not supported by ...", instead.

diff --git a/lib/PublicInbox/Admin.pm b/lib/PublicInbox/Admin.pm
index b8ead6f703984153712640cd1af6928a5c0d060c..fb88e621b021b8b68e47c1524fd9227634abf81a 100644 (file)
--- a/lib/PublicInbox/Admin.pm
+++ b/lib/PublicInbox/Admin.pm
@@ -131,7 +131,7 @@ EOF
                }
        }
        if (@old) {
-               die "inboxes $min_ver inboxes not supported by $0\n\t",
+               die "-V$min_ver inboxes not supported by $0\n\t",
                    join("\n\t", @old), "\n";
        }
        @ibxs;