The test script had an incomplete and ineffective attempt to avoid
clobbering the testing user's real crontab (and its equivalents),
which has been completed.
* es/test-cron-safety:
test-lib: fix non-functioning GIT_TEST_MAINT_SCHEDULER fallback
# Tests that verify the scheduler integration must set this locally
# to avoid errors.
GIT_TEST_MAINT_SCHEDULER="none:exit 1"
+export GIT_TEST_MAINT_SCHEDULER
# Does this platform support `git fsmonitor--daemon`
#