t3920: don't ignore errors of more than one command with `|| true`
It is customary to write `A || true` to ignore a potential error exit of
command A. But when we have a sequence `A && B && C || true && D`, then
a failure of any of A, B, or C skips to D right away. This is not
intended here. Turn the command whose failure is to be ignored into a
compound command to ensure it is the only one that is allowed to fail.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>