Add update_with_only_comment option

[jestemkarol]

Added on f2de4e6
Currently there is a possibility to update an audit if only audit comment is present:

assert_difference('post.audits.count', 1) { post.update_attributes(audit_comment: 'Only comment') }

In my opinion, updating an audit with only comment given is purposeless, as in fact there are no changes at all

[domcleal]

Since this seems to be a matter of opinion, would you mind implementing this as a configuration option on Audited to control the behaviour?

[jestemkarol]

I've updated PR with an implementation of the configuration option, but it seems like Travis cached bundler and it needs to be rebuilt somehow, I guess.

PS. Sorry for late response 😄

[domcleal]

PR looks good to me! 👍

I've opened a PR to fix the test failures, it's been a while since they ran. Once we've got that fixed then we can merge back and get this PR in.

PS. Sorry for late response 😄

No worries, I'm sure I've done worse 😁

[domcleal]

That's now fixed - would you mind doing git merge origin/master (or git rebase origin/master if you prefer) and pushing please? That'll pick up the test fixes I hope.

[jestemkarol]

Yup, all green right now 👌

[domcleal]

Thanks @jestemkarol 👍

[Marri]

@jestemkarol thank you for this! We had hacked around this and our code is much cleaner now.