t1503: Fix arithmetic expansion syntax error when using dash

On systems which have dash as /bin/sh, such as Ubuntu, the final
test (master@{n} for various n) fails with a syntax error while
processing an arithmetic expansion. The syntax error is caused by
using a bare name ('N') as a variable reference in the expression.

In order to avoid the syntax error, we spell the variable reference
as '$N' rather than simply 'N'.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t1503-rev-parse-verify.sh b/t/t1503-rev-parse-verify.sh
index 100f857b168b1d8b88ea1a1e7e31ba42a2beee6c..813cc1b3e29ec840deb63ad9c3c1dffd2187cdc5 100755 (executable)
--- a/t/t1503-rev-parse-verify.sh
+++ b/t/t1503-rev-parse-verify.sh
@@ -106,8 +106,8 @@ test_expect_success 'use --default' '
 
 test_expect_success 'master@{n} for various n' '
        N=$(git reflog | wc -l) &&
-       Nm1=$((N-1)) &&
-       Np1=$((N+1)) &&
+       Nm1=$(($N-1)) &&
+       Np1=$(($N+1)) &&
        git rev-parse --verify master@{0} &&
        git rev-parse --verify master@{1} &&
        git rev-parse --verify master@{$Nm1} &&