- [Bump parallel_tests from 2.22.0 to 2.22.1 in /Library/Homebrew/test](

Homebrew#4805) (@Homebrew)

- [os/mac: note installation docs need bumped too.](Homebrew#4806) (@MikeMcQuaid)
- [formulary: NameError makes formulae unreadable.](Homebrew#4804) (@MikeMcQuaid)
- [.rubocop: tweak rules.](Homebrew#4797) (@MikeMcQuaid)
- [Revert "Add `$LOAD_PATH` for RuboCop cops."](Homebrew#4798) (@Homebrew)
- [tests: handle file leaks and SVN test prompt.](Homebrew#4795) (@MikeMcQuaid)
- [Improve Homebrew/brew line length.](Homebrew#4784) (@MikeMcQuaid)
- [tests: set HOME.](Homebrew#4794) (@MikeMcQuaid)
- [cleanup: fix go_cache cleanup](Homebrew#4778) (@DomT4)
- [Fix `CurlApacheMirrorDownloadStrategy` URL resolution.](Homebrew#4791) (@reitermarkus)
- [Avoid network call in `#initialize`.](Homebrew#4789) (@reitermarkus)
- [Skip migration if cache is empty or doesn’t exist.](Homebrew#4788) (@reitermarkus)
- [quarantine: do not automatically follow symlinks](Homebrew#4782) (@amyspark)
- [Only migrate cache files containing `--`.](Homebrew#4787) (@reitermarkus)
- [Skip `mtime` for non-existent symlink.](Homebrew#4785) (@reitermarkus)
- [Resolve URL to get real file extension.](Homebrew#4662) (@reitermarkus)
- [[Security] Bump rubyzip from 1.2.1 to 1.2.2 in /docs](Homebrew#4783) (@Homebrew)
- [Enable quarantining of Homebrew-Cask's downloads](Homebrew#4656) (@amyspark)
- [superenv: Use 02 optimization flag for Linux builds](Homebrew#4773) (@iMichka)
- [docs/Maintainer-Guidelines: add lead maintainer guidelines.](Homebrew#4759) (@MikeMcQuaid)
- [go: support & use aggressive caching](Homebrew#4774) (@DomT4)
- [text_cop: update `cargo build` cop](Homebrew#4775) (@commitay)
- [Add `$LOAD_PATH` for RuboCop cops.](Homebrew#4771) (@reitermarkus)
- [Fix executable with spaces.](Homebrew#4776) (@reitermarkus)
- [style: Fix npe and add test for corrected offense results](Homebrew#4770) (@GauthamGoli)
- [audit: Use `fetch` with default value prevent NPE](Homebrew#4765) (@GauthamGoli)
- [Don’t use `CLI::Cleanup` in `Auditor`.](Homebrew#4766) (@reitermarkus)
- [audit: Add null check on style results](Homebrew#4764) (@GauthamGoli)
- [Check version conflicts using linkage.](Homebrew#4762) (@MikeMcQuaid)
- [extract: update docs](Homebrew#4754) (@alebcay)
- [audit: Show RuboCop offense correction status and count in output](Homebrew#4753) (@GauthamGoli)
- [Add new extract dev command to retrieve old versions of formulae](Homebrew#4563) (@alebcay)
- [Fix for Linux make shim](Homebrew#4570) (@maxim-belkin)
- [brew.sh: Export HOMEBREW_GIT](Homebrew#4748) (@woodruffw)
- [audit: remove "`bottle` is not defined"](Homebrew#4742) (@commitay)
- [formula_cellar_checks: .dylib and .framework are macOS-specific](Homebrew#4743) (@maxim-belkin)
- [manpage: update from latest homebrew-bundle docs.](Homebrew#4747) (@MikeMcQuaid)
- [dev-cmd/bottle: save local_filename to json](Homebrew#4736) (@scpeters)
- [`.tar.lz` ≠ `.tar.lzma`](Homebrew#4735) (@reitermarkus)
- [Ignore unparsable system languages.](Homebrew#4728) (@reitermarkus)

Merge pull request Homebrew#4731 from reitermarkus/use-cp

Use `cp` instead of `FileUtils.copy_entry`.

Merge pull request Homebrew#4536 from reitermarkus/container-system-c…

…ommand

Add `system_command` helpers.

Merge pull request Homebrew#4481 from reitermarkus/unpack-strategies

Add two new unpack strategies.

Merge pull request Homebrew#4472 from MikeMcQuaid/mv-mktemp

formula: move mktemp.

Merge pull request Homebrew#4457 from commitay/latest-autoupdate

cask audit: check for `latest` with `auto_updates`

Merge pull request Homebrew#4467 from MikeMcQuaid/portable-ruby-clean…

…up-gems

ruby.sh: cleanup gems on portable Ruby installation.

Merge pull request Homebrew#4453 from reitermarkus/fix-system-command

Fix `SystemCommand` `:path`.

Merge pull request Homebrew#4450 from MikeMcQuaid/no-really-no-beta-s…

…upport

diagnostic: be clearer about what we support.

Merge pull request Homebrew#4406 from commitay/python-3.7

language/python, docs: updates for python 3.7