Using sshkit@master, airbrussh command output is sometimes truncated/malformatted

[mattbrictson]

When running against capistrano/sshkit@c840d4f, and when setting airbrussh's command_output=true, sometimes the output that is printed is truncated and strangely formatted.

For example, the Pretty formatter correctly shows the expected output:

 DEBUG [dd068496]   28f6d5b8bc180225ea83bc2f87d3ec4fbe1fe88b    refs/heads/analytical
a0d107abac1f7312c76da7cadd94e471cf29e02e    refs/heads/google-analytics
3405c542e9bf56dbe7b64020c1f7b67185edb589    refs/heads/master
a3cc7a6d62986a085ffd0d27dae85812e335fb25    refs/heads/outdated
43b8fc41129d7afd05e70369d56025b11f07345a    refs/heads/pacific-time
f3b9157c004d3edbc195fef1138f6d680199ff76    refs/heads/sitemap

But the airbrussh console output only shows:

00:01 git:check
      01 git ls-remote --heads git@bitbucket.org:user/repo.git
      01 28f6d5b8bc180225ea83bc2f87d3ec4fbe1fe88b refs/heads/analytical
a0d107abac1f7312c76da7cadd94e471cf29e02e  refs…
    ✔ 01 deployer@remote-ip 1.479s

My guess is that output being logged contains newlines which should be split before sending to Console#print_line.

[mattbrictson]

Fixed via #51.