Improve output on command failure
Improve output on command failure

mattbrictson/capistrano-mb,x44x45x41x4E/capistrano-mb,m43nu/capistrano-mb,m43nu/capistrano-mb,mattbrictson/capistrano-mb,m43nu/capistrano-mb,x44x45x41x4E/capistrano-mb,x44x45x41x4E/capistrano-mb,mattbrictson/capistrano-mb