This was accounted for in Version::NULL.<=>, but not in Version#<=>,
so these could only be compared if Version::NULL was the left hand
side.

The check had to go above the check that `other` is a version because
`Version::NULL`'s anonymous class does not inherit from `Version`.
(The type check feels like it's probably a smell, but out of scope).

Fix `rspec` deprecations.

Update Cask tap regex.

Update Homebrew-Cask references.

Reset `repo_var` so it actually is re-computed.

This reverts commit 4475651b.

Activate Homebrew-Cask tap migration.

cli_parser: Add depends_on, required_for and conflicts for switch options

spec_helper: don't truncate output expectations.

Otherwise this will mess with `brew tests`.

It's really useful to be able to see the full output particularly when
a backtrace is in it.

It's really useful to be able to see the full output particularly when
a backtrace is in it.

Cache optimization for `brew linkage` command.

audit: new formulae should not have options

Remove some integration tests

We have an awful lot of integration tests and they are (comparatively)
really slow. Let's kill those that test edge case conditions and focus
on those that test that our functionality works as expected. Edge cases
can be better tested with unit tests.

Fix brew pull with git commit.gpgsign enabled

audit: add back new formulae condition for patches

audit: Add condition check on new_formula_audits

Doco: add a Shell Completion doc

audit: exit with code 1 if regular audit errors or new formula audit errors when comment is not created