t0021, t5615: use $PWD instead of $(pwd) in PATH-like shell variables

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index 9ff502773d07819b43d027a0a1ee0fdf98f77e93..b93cd44546f6933a313ebcc5fd273f2b953fa1c2 100755 (executable)
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -4,7 +4,7 @@ test_description='blob conversion via gitattributes'
 
 . ./test-lib.sh
 
-TEST_ROOT="$(pwd)"
+TEST_ROOT="$PWD"
 PATH=$TEST_ROOT:$PATH
 
 write_script <<\EOF "$TEST_ROOT/rot13.sh"