+ if [ "$TESTS_SHELL"x = x ]; then
+ #### Bonus: use heirloom shell to test, if available, and if
+ #### TESTS_SHELL hadn't already been set.
+ heirloom_shell=/usr/lib/heirloom/5bin/sh
+ if [ -x "$heirloom_shell" ]; then
+ TESTS_SHELL="$heirloom_shell"; export TESTS_SHELL
+ fi
+ fi
+