t/t5538-push-shallow.sh: use the $( ... ) construct for command substitution

diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
index def203c7243c099e1359b9a0c44f22a07c06cb37..133b5842b1aee8e8e00eb0ca7e1b2d32ff4a4c9a 100755 (executable)
--- a/t/t5304-prune.sh
+++ b/t/t5304-prune.sh
@@ -266,7 +266,7 @@ EOF
 '
 
 test_expect_success 'prune .git/shallow' '
-       SHA1=`echo hi|git commit-tree HEAD^{tree}` &&
+       SHA1=$(echo hi|git commit-tree HEAD^{tree}) &&
        echo $SHA1 >.git/shallow &&
        git prune --dry-run >out &&
        grep $SHA1 .git/shallow &&