tests: fix check for --graph option in test-log-linerange.t...
tests: fix check for --graph option in test-log-linerange.t
Previous test about incompatibility of --line-range and --graph options
was problematic because, even without --graph option, the command would
have failed because specified path (dir/baz) did not exist as it got
dropped in previous test statements. New test statements should work
without --graph. This prepares for making --line-range compatible with
--graph option.