Omit spurious string from unit test debugging efforts
When both 'broken' and 'failed' test cases appear in unit test output
...
===> Broken tests
lib/isc/tests/socket_test:main -> broken: Test case timed out [300.022s]
===> Failed tests
lib/isc/tests/time_test:main -> failed: 2 of 6 tests failed [0.006s]
===> Summary
...
spurious '===>' string gets matched, that results in the following error:
Usage error for command debug: '===>' is not a test case identifier (missing ':'?).
Following change makes sure the string is omitted.
I checked on FreeBSD and OpenBSD that the AWK construct is supported.