Note that there is a system-level zlib dependency that is not managed via this Formula. (It appears that installing zlib outside of the system-provided library can cause issues.)
Other than that, things check out.
Please squash to a single commit
vowpal wabbit v7.0
Ah - updated! Thanks!
vowpal wabbit 7.0
Signed-off-by: Adam Vandenberg <firstname.lastname@example.org>