linkage_checker: whitelist libthread_db.so.1

openjdk links against this library, which is provided by glibc.

build: bump listen from 3.2.0 to 3.2.1 in /docs

Bumps [listen](https://github.com/guard/listen) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](https://github.com/guard/listen/compare/v3.2.0...v3.2.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fix bug with printing pinned dependencies.

Brew prints this error:
```
Error: undefined method `join' for nil:NilClass
```

because, in this code:

```ruby
puts pinned_dependents.map do |f|
  "#{f.full_specified_name} #{f.pkg_version}"
end.join(", ")
```
the block is passed to `puts` and not to `map`. `.join(",")` is called on the output of `puts`.

(I think the regression was introduced in this commit: e12a7b08)

FormulaInstaller: rescue already attempted install

build: bump nokogiri from 1.10.5 to 1.10.7 in /Library/Homebrew

build: bump mustache from 1.1.0 to 1.1.1 in /Library/Homebrew

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.5 to 1.10.7.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.5...v1.10.7

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

build: bump github-pages from 202 to 203 in /docs

Bumps [mustache](https://github.com/mustache/mustache) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/mustache/mustache/releases)
- [Changelog](https://github.com/mustache/mustache/blob/master/HISTORY.md)
- [Commits](https://github.com/mustache/mustache/compare/v1.1.0...v1.1.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github-pages](https://github.com/github/pages-gem) from 202 to 203.
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/compare/v202...v203

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

.github/workflows/tests: run config, doctor.

This should help with debugging why the `brew bundle` tests are now
failing.

extract: semver aware

Rename Formula#installed? to Formula#latest_version_installed?

This naming has always been a bit weird and confusing so let's change
it and provide a `compat` fallback for later deprecation.

Update formatting of status messages

Fixed "Project Leader" link

os/mac/xcode: add additional CLT download link.

Sadly Apple don't seem to be providing these reliably.

Fixes #6796

build: bump zeitwerk from 2.2.1 to 2.2.2 in /Library/Homebrew

README: Remove Patreon badge for consistency amongst donation methods

Bumps [zeitwerk](https://github.com/fxn/zeitwerk) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/fxn/zeitwerk/releases)
- [Changelog](https://github.com/fxn/zeitwerk/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fxn/zeitwerk/compare/v2.2.1...v2.2.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

- We don't have a badge for other donation methods - this looked slightly out of place.

Fix `brew cask style`.

This verifies the cask configuration hasn't been broken.

Broken since a RuboCop update.

These sometimes display useful RuboCop deprecations.

Issues: add section for brew config & doctor output

workflows/apidoc: try to rebase before pushing.