t/t7003-filter-branch.sh: use the $( ... ) construct for command substitution

diff --git a/t/t3030-merge-recursive.sh b/t/t3030-merge-recursive.sh
index 6224187632b105edf1940023eba4a49523d92fe2..f7b0e599f1124c332a106a3b8df6f304382c2fa4 100755 (executable)
--- a/t/t3030-merge-recursive.sh
+++ b/t/t3030-merge-recursive.sh
@@ -263,7 +263,7 @@ test_expect_success 'setup 8' '
        test_ln_s_add e a &&
        test_tick &&
        git commit -m "rename a->e, symlink a->e" &&
-       oln=`printf e | git hash-object --stdin`
+       oln=$(printf e | git hash-object --stdin)
 '
 
 test_expect_success 'setup 9' '