* Anything on the command line after "run-tests.sh" will be understood
as a regular expression (if there is more than one argument, they are
concatenated, with spaces in between) and only the tests whose "full
names" match that regexp will be run. The full name of a test is the
"describe" string plus a space plus the "it" string. Note well that,
unlike the test-runner output, there is no colon in there.
* run-tests.sh and run-tests.js now correctly handle being invoked from
an arbitrary directory; the cwd does not have to be the project root.
* Shell portability fixes for run-tests.sh.
#12230 (Test suite improvements).
Zack Weinberg