These are the ones that are auto-installed without tapping and it makes
sense to make them more prominent in our documentation as we've
offloaded various functionality over the years to each of them.

update-test: fix tag updating, skip core tap.

Fix updating the `stable` branch used for tagged updates and ensure
that the core tap isn’t retapped (the slowest part by far of this test).

help: support `#:` help in external commands.

install: remove not updated warning.

Fix `Tty.gray`.

Refactor Tty.

Use separate RuboCop configs for formulae and core code.

This is no longer relevant after moving to taps/tags and if ever
re-added it should probably target homebrew/core.

Fixes #1194.

Fixes https://github.com/Homebrew/homebrew-test-bot/issues/3

analytics: don't report commands run by Homebrew

upgrade: tell people that --all is a no-op.

update-test: add --to-tag option.

Fixes #788.

Apparently this is still run by people so let's tell them to save
some typing.

man: note --fail-if-changed date behaviour change.

This option is used to test updating between tags.

Store the formula used to build the keg in the keg

As requested in #1199 this updates the documentation accordingly for
that change.

man: set date when --fail-if-changed.

This allows having a shared style that’s use for Homebrew/brew and taps
which can be overridden by Homebrew/brew.

Set the manpage date to the existing one if we're checking for changes.
This avoids the only change being e.g. a new date.

Man exit code

update.sh: use sort instead of git tag --sort.

The --fail-if-changed option will cause `brew man`
to return a failing status code if the man files
have changed.

This is a full rewrite of the zsh completion based on the changes we
made to support external commands. A function for each brew command
handles only that command's arguments. The main completion function
dispatches the completion flow to the correct function. This
generically works with both internal and external commands.

This change includes all arguments for all internal brew commands.
Some commands are missing argument documentation due to missing help
docs.

Update `rubocop-cask` to 0.10.0.

completion: Avoid aliases with `command ls`