Merge pull request #6835 from EricFromCanada/input-handling

Library/Homebrew/cli/parser.rb

Library/Homebrew/cmd/--env.rb

Library/Homebrew/cmd/--version.rb

Library/Homebrew/cmd/analytics.rb

Library/Homebrew/cmd/cat.rb

Library/Homebrew/cmd/cleanup.rb

Library/Homebrew/cmd/command.rb

Library/Homebrew/cmd/commands.rb

Library/Homebrew/cmd/config.rb

Library/Homebrew/cmd/desc.rb

Library/Homebrew/cmd/diy.rb

Library/Homebrew/cmd/doctor.rb

Library/Homebrew/cmd/gist-logs.rb

Library/Homebrew/cmd/info.rb

Library/Homebrew/cmd/install.rb

Library/Homebrew/cmd/leaves.rb

Library/Homebrew/cmd/link.rb

Library/Homebrew/cmd/log.rb

Library/Homebrew/cmd/missing.rb

Library/Homebrew/cmd/outdated.rb