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

diff --git a/t/t3101-ls-tree-dirname.sh b/t/t3101-ls-tree-dirname.sh
index 026f9f89d916fdd0547c58aed7bcba7f06850023..425d858938f51bdb8745b28e92c74246e618ef07 100755 (executable)
--- a/t/t3101-ls-tree-dirname.sh
+++ b/t/t3101-ls-tree-dirname.sh
@@ -35,7 +35,7 @@ test_expect_success 'setup' '
        echo 222 >path3/2.txt &&
        find *.txt path* \( -type f -o -type l \) -print |
        xargs git update-index --add &&
-       tree=`git write-tree` &&
+       tree=$(git write-tree) &&
        echo $tree
 '