SSH host key without comment adds trailing newline

If the SSH host public key file does not contain a comment, the public key will contain a trailing newline.

For example:

$ echo 'ssh-rsa public-key' >/etc/ssh/ssh_host_rsa_key.pub

$ facter ssh

{

  rsa => {

    key => "public-key

"

  }

}

If the key contains a comment, we do not get the trailing newline:

$ echo 'ssh-rsa public-key comment' >/etc/ssh/ssh_host_rsa_key.pub

$ facter ssh

{

  rsa => {

    key => "public-key"

  }

}

The trailing newline causes issues when using the resulting fact directly in a sshkey resource, where the trailing newline makes Puppet think the resource is changed on every run.