Fix typo in paper_trails callbacks docs

[MistaTwista]

There was a typo in callback names not paper_trail.on_destroy, but paper_trail_on_destroy, etc.

[batter]

This is actually the desired syntax for the PaperTrail 5.2+ if I'm not mistaken, right @jaredbeck?

Using either syntax should work, but in the future I believe we want to deprecate the paper_trail_method_name syntax in favor of the paper_trail.method_name syntax.

@MistaTwista - See #719 for more context.

[jaredbeck]

Thanks, Maxim, but paper_trail.on_create (with dot) is correct. See #719

[jaredbeck]

Using either syntax should work, but in the future I believe we want to deprecate the paper_trail_method_name syntax in favor of the paper_trail.method_name syntax.

Those methods have already been removed, by #864

[batter]

@jaredbeck - I meant in released versions of PaperTrail (aka v5.x)

[jaredbeck]

@jaredbeck - I meant in released versions of PaperTrail (aka v5.x)

Ah, quite right. They've been removed, but only in master.