Modernize brief case to briefcase

[robinwhittleton]

One one false positive in the corpus: “the most celebrated pleaders vied with one another in bringing before him, not trifling and brief cases according to the usual custom.”

I’ve updated the rest already.

[acabal]

with \b at the end this would not match briefcases, do we want that?

[robinwhittleton]

Of course that’d be better. When I updated the corpus I’d searched, tested the new function a couple of times, then changed the rest manually. Tested this on Suetonius to make sure it works.

[acabal]

Thanks!