Merge pull request #1732 from zmwangx/hint-migrations

Library/Homebrew/blacklist.rb

Library/Homebrew/cmd/info.rb

Library/Homebrew/cmd/install.rb

Library/Homebrew/cmd/log.rb

Library/Homebrew/cmd/search.rb

Library/Homebrew/dev-cmd/audit.rb

Library/Homebrew/dev-cmd/create.rb

Library/Homebrew/extend/os/blacklist.rb

Library/Homebrew/extend/os/mac/blacklist.rb

Library/Homebrew/extend/os/mac/missing_formula.rb

Library/Homebrew/extend/os/missing_formula.rb

Library/Homebrew/missing_formula.rb

Library/Homebrew/tap.rb

Library/Homebrew/test/blacklist_spec.rb

Library/Homebrew/test/cmd/log_spec.rb

Library/Homebrew/test/missing_formula_spec.rb