Extract tarballs with a UTF-8 locale #24304

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  LC_ALL=C makes tar fail on archives containing non-ASCII paths because bsdtar cannot convert those paths to an ASCII character set. This broke with https://github.com/Homebrew/brew/pull/24278.


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  en_US.UTF-8 keeps diagnostics in English for the out-of-space handling in unpack_strategy.rb while allowing UTF-8 paths

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Github Copilot diagnosed the issue in an Actuion Run and Claude Opus 5.5 was used to validate and look at formula-side workarounds. The diff itself is trivial.

Summary by CodeRabbit

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  Bug Fixes
  
  
  • Improved TAR archive extraction for paths containing non-ASCII characters.
  
  
  • Preserved English-language extraction diagnostics while using UTF-8 locale support.