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The test_must_fail function should only be used for git commands since we should assume that external commands work sanely. Since has_cr() just wraps a tr and grep pipeline, replace `test_must_fail has_cr` with `! has_cr`. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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