tests: fix non-portable "${var:-"str"}" construct
On both AIX 7200-00-01-1543 and FreeBSD 11.2-RELEASE-p2 the "${var:-"str"}" syntax means something different than what it does under the bash or dash shells. Both will consider the start of the new unescaped quotes to be a new argument to test_expect_success, resulting in the following error: error: bug in the test script: 'git diff-tree initial # magic is (not' does not look like a prereq Fix this by removing the redundant quotes. There's no need for them, and the resulting code works under all the aforementioned shells. This fixes a regression in c2f1d398 ("t4013: test new output from diff --abbrev --raw", 2017-12-03) first released with Git v2.16.0. Signed-off-by: NÆvar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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