run a command 'n' times exiting early if it fails
try_repeat tries to run a command n times, exiting early if the command exits
with a non-zero exit code. This is useful when trying to find intermittent
failures in a command.

Maintainer: Laurence Tratt <laurie@tratt.net>

WWW: https://tratt.net/laurie/src/try_repeat/
