Intended for use with -O; outputs "-e" followed by the full name of the
failed example.

A raw split causes carefully-escaped example names to get screwed up.
It's also more consistent with the spirit of the external options files
(equivalence with what you might provide on the command line).

It will now run examples whose names match any of the provided regular
expressions.

Ties together the failure formatter, the additive -e, and use of the
supplemental -O command-line options file.

Split the feature to hopefully assuage dblock's concern about how
multiple output/format specifications work.

…icial-retry