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

diff --git a/t/t5530-upload-pack-error.sh b/t/t5530-upload-pack-error.sh
index 3932e797f7f60545e6e8c140824a5ca5ee16832a..4f6e32b04c48b7723a2b9dc172cd2104c3349e0b 100755 (executable)
--- a/t/t5530-upload-pack-error.sh
+++ b/t/t5530-upload-pack-error.sh
@@ -4,7 +4,7 @@ test_description='errors in upload-pack'
 
 . ./test-lib.sh
 
-D=`pwd`
+D=$(pwd)
 
 corrupt_repo () {
        object_sha1=$(git rev-parse "$1") &&