Gem::Commands::ContentsCommand#files_in_default_gem

# File tmp/rubies/ruby-3.0.5/lib/rubygems/commands/contents_command.rb, line 103
def files_in_default_gem(spec)
  spec.files.map do |file|
    case file
    when /\A#{spec.bindir}\//
      # $' is POSTMATCH
      [RbConfig::CONFIG['bindir'], $']
    when /\.so\z/
      [RbConfig::CONFIG['archdir'], file]
    else
      [RbConfig::CONFIG['rubylibdir'], file]
    end
  end
end