Bump html-proofer from 3.10.0 to 3.10.1 in /docs

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.10.0 to 3.10.1.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Commits](https://github.com/gjtorikian/html-proofer/compare/v3.10.0...v3.10.1

)

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

Fiks HOMEBREW_NO_BOTTLE_SOURCE_FALLBACK description

This change fixes a syntax error introduced in b278165d

Fix some bottling logic

- We've never supported `devel` bottles so don't bother outputting their
  status to `brew info`
- Don't `brew upgrade` or `brew reinstall` bottles if they were
  previously built as a bottle unless there's no bottles defined at all
  (rather than there was no compatible bottles). Fixes #5532.

Bump i18n from 1.5.1 to 1.5.2 in /Library/Homebrew/vendor

bash completions: start auto-completing early

Bump nokogiri from 1.10.0 to 1.10.1 in /docs

Bumps [i18n](https://github.com/svenfuchs/i18n) from 1.5.1 to 1.5.2.
- [Release notes](https://github.com/svenfuchs/i18n/releases)
- [Changelog](https://github.com/ruby-i18n/i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/svenfuchs/i18n/compare/v1.5.1...v1.5.2

)

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

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.0 to 1.10.1.
- [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/v1.10.0...v1.10.1

)

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

Fix missing `require`.

cli_parser: Output help text on invalid option passed

Better handle missing environment variables when updating

Try to re-exec the Homebrew binary to get the environment variables we
need and give up if that doesn't work.

Add HOMEBREW_NO_BOTTLE_SOURCE_FALLBACK variable

cmd/search: fix truncated regex warning.

update: make git rebase be quiet.

If set, Homebrew will fail if on the failure of installation from a
bottle rather than falling back to building from source.

`ohai` doesn't really work for this case.

Fixes #5520.

`--quiet` doesn't seem to be working as expected.

bash completions: use proper Bash syntax

Bump ethon from 0.11.0 to 0.12.0 in /docs

Bumps [ethon](https://github.com/typhoeus/ethon) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/typhoeus/ethon/releases)
- [Changelog](https://github.com/typhoeus/ethon/blob/v0.12.0/CHANGELOG.md)
- [Commits](https://github.com/typhoeus/ethon/compare/v0.11.0...v0.12.0

)

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

compat: correct MacOS.prefer_64_bit? deprecation

spec_helper: tweak parallel tests handling.

- only hide filtered runs in parallel (where they are super noisy)
- only send SimpleCov coverage once to Coveralls

config: better handle missing variables.

We don’t really have a better solution than this because of how the auto-updater’s Bash code worked on the version they are updating from. Users will never hit this more than once.

Fixes #5513

Update Shell-Completion.md