Tomi Ollila authored Jul 31, 2022 and David Bremner committed Jul 31, 2022

Removed duplicate error check (and the message) in 3rd case where
the same error message (w/o trailing newline) was present.

In case of test/T040-setup.sh, command substitution deletes
trailing newlines, so related test there cannot be changed
(and therefore could not notice this user experience flaw).