t/t2025-worktree-add.sh: use the $( ... ) construct for command substitution

diff --git a/unimplemented.sh b/unimplemented.sh
index 5252de4b252070637c1b4badf7989e791f3b8c75..fee21d24e8ab89208b4aa0af7007b7c033b753bc 100644 (file)
--- a/unimplemented.sh
+++ b/unimplemented.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 
-echo >&2 "fatal: git was built without support for `basename $0` (@@REASON@@)."
+echo >&2 "fatal: git was built without support for $(basename $0) (@@REASON@@)."
 exit 128