Rescue more errors during `cask upgrade`.

shell commands: colourize messages

Move some brew-test-bot logic to GitHub Actions.

This will improve the output and ease of parsing while allowing code to
be removed from brew-test-bot which relates only to a single repo (this
one).

utils/inreplace: do not allow to use empty list of files

info: adjust handling of analytics flags

build: bump rspec-retry from 0.6.1 to 0.6.2 in /Library/Homebrew

Bumps [rspec-retry](https://github.com/noredink/rspec-retry) from 0.6.1 to 0.6.2.
- [Release notes](https://github.com/noredink/rspec-retry/releases)
- [Changelog](https://github.com/NoRedInk/rspec-retry/blob/master/changelog.md)
- [Commits](https://github.com/noredink/rspec-retry/compare/v0.6.1...v0.6.2

)

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

Fix that `reason` is coerced to a boolean

https://github.com/Homebrew/brew/commit/f762033a57be271b778be6e39fe7d5b9d068ec64 introduced a bug such that `reason` is coerced to a boolean, so when displayed it loses information about the actual return value from `MissingFormula.reason`. This patch re-scopes the assignment of `reason` such that the actual reason is retained, while also retaining the sense of the new boolean check.

shims/super/cc: remove isysroot space to fix cpp

Upped the timeout for curl to 15 seconds to match other code

Remove `--local` from `git config` commands as it's the default

README: tweak donations, sponsors.

Bump Xcode to 11.2.1

Move "Donations" below "Contributing" so people see it more and remove CommsWorld who we no longer use.

build: bump html-proofer from 3.13.0 to 3.14.1 in /docs

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.13.0 to 3.14.1.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Commits](https://github.com/gjtorikian/html-proofer/compare/v3.13.0...v3.14.1

)

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

docs: New linuxbrew + bump-formula-pr changes

Fixes #5153

- The `--local` option doesn't exist in early versions of git (~1.7),
  but its behaviour is the default (saving in the current repo's .git
  directory).
- As it's the default across versions, we don't need to specify it
  everywhere.
- Reported in Linuxbrew/install issue 78.

bump-formula-pr: make it usable on linux

This commit makes it possible to use `bump-formula-pr` on linux to
contribute to `homebrew-core` as easily as it is on macOS, but with some
additional steps made before actual bumping of the formula.

Differences in the process (before bumping):
- add `homebrew-core` remote named `homebrew`
- fetch `homebrew/master`
- check if formula exists in `homebrew-core`
- switch to `homebrew/master` ref

formula: copy hidden files _from_ bottles.

work correctly info analysis args

build: bump html-pipeline from 2.12.1 to 2.12.2 in /docs

cask_loader: fix URI detection.

Bumps [html-pipeline](https://github.com/jch/html-pipeline) from 2.12.1 to 2.12.2.
- [Release notes](https://github.com/jch/html-pipeline/releases)
- [Changelog](https://github.com/jch/html-pipeline/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jch/html-pipeline/compare/v2.12.1...v2.12.2

)

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

cmd/upgrade: fix exit logic.

Fixes #6678

Fixes #6739