numbers matching <pattern>. The number matched against is
simply the running count of the test within the file.
+-x::
+ Turn on shell tracing (i.e., `set -x`) during the tests
+ themselves. Implies `--verbose`. Note that this can cause
+ failures in some tests which redirect and test the
+ output of shell functions. Use with caution.
+
-d::
--debug::
This may help the person who is developing a new test.