- We should tell people to not report issues if they are running in an
unsupported configuration.
- We should tell people to run `brew update` before reporting issues if
they have `HOMEBREW_NO_AUTO_UPDATE` set.
- We should tell people to not report issues in more types of
exceptions.
- Warn people in `HOMEBREW_NO_AUTO_UPDATE` documentation.
- DRY up `brew.rb` exception handling.
Co-authored-by: Colin Dean <colindean@users.noreply.github.com>
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