Updated file_line docs for accuracy and non-badness.

[big-samantha]

The file_line with match example was broken, because the match
didn't match the line.

In addition, it was a bad example, because it shows using file_line to
modify /etc/fstab, which should really be done with the mount
provider.

In addition, the text didn't explain fully how to use match.

[raphink]

Arguably, this example is not really good either, as it could be done with the shellvar type:

shellvar { 'HTTP_PROXY':
  ensure  => exported,
  value   => 'http://squid.puppetlabs.vm:3128',
  target  => '/etc/bashrc',
}

[big-samantha]

Hmm, I'm not sure I agree. I don't exactly disagree, but the shellvar type is not a built int type, and so this example seems fine to me. That being said, I'm open to an alternative suggestion :)

[igalic]

if you aren't using shellvar, you totally should ;)

[DavidS]

The current example edits /etc/sudoers and does not use match at all, so I'm closing this.