tests: use "env" to run commands with temporary env-var settings

diff --git a/t/t6006-rev-list-format.sh b/t/t6006-rev-list-format.sh
index 98744038eccb396c752e6a4b6ced702733c0d396..9d9d9de08e1926525c24fc01c1217a96964fa1ee 100755 (executable)
--- a/t/t6006-rev-list-format.sh
+++ b/t/t6006-rev-list-format.sh
@@ -190,12 +190,9 @@ test_expect_success '%C(auto) respects --no-color' '
 '
 
 test_expect_success TTY '%C(auto) respects --color=auto (stdout is tty)' '
-       (
-               TERM=vt100 && export TERM &&
-               test_terminal \
-                       git log --format=$AUTO_COLOR -1 --color=auto >actual &&
-               has_color actual
-       )
+       test_terminal env TERM=vt100 \
+               git log --format=$AUTO_COLOR -1 --color=auto >actual &&
+       has_color actual
 '
 
 test_expect_success '%C(auto) respects --color=auto (stdout not tty)' '