When auditing new formulae without `--new-formula` the
`audit_revision_and_version_scheme` method fails ungracefully. Instead,
set some better defaults so fewer checks are needed.
Fixes#2551.
This is the (partially) documented public API for Homebrew.
The main class you should look at is the {Formula} class (and classes linked from there). That's the class that's used to create Homebrew formulae (i.e. package descriptions). Assume anything else you stumble upon is private.
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