rubocop --auto-correct all hash-rocket usage.

Library/.rubocop.yml

Library/Homebrew/brew.rb

Library/Homebrew/build.rb

Library/Homebrew/cleanup.rb

Library/Homebrew/cmd/deps.rb

Library/Homebrew/cmd/fetch.rb

Library/Homebrew/cmd/gist-logs.rb

Library/Homebrew/cmd/linkapps.rb

Library/Homebrew/cmd/outdated.rb

Library/Homebrew/cmd/prune.rb

Library/Homebrew/cmd/readall.rb

Library/Homebrew/cmd/style.rb

Library/Homebrew/cmd/tap.rb

Library/Homebrew/cmd/unlinkapps.rb

Library/Homebrew/cmd/unpack.rb

Library/Homebrew/cmd/update-report.rb

Library/Homebrew/cmd/upgrade.rb

Library/Homebrew/compilers.rb

Library/Homebrew/descriptions.rb

Library/Homebrew/dev-cmd/audit.rb