anchor.diff:          messages.add(ValidationMessage.error(
             'ideviceinstaller is not installed; this is used to discover connected iOS devices.\n'
             'To install, run:\n'
  +          '  brew install --HEAD usbmuxd\n'
  +          '  brew link usbmuxd\n'
             '  brew install --HEAD libimobiledevice\n'
             '  brew install ideviceinstaller'
           ));
  
positive.code:             'Verify that all connected devices have been paired with this computer in Xcode.\n'
              'If all devices have been paired, libimobiledevice and ideviceinstaller may require updating.\n'
              'To update, run:\n'
              '  brew uninstall --ignore-dependencies libimobiledevice\n'
              '  brew install --HEAD libimobiledevice\n'
              '  brew install ideviceinstaller'
          ));
  
negative.code:         brewStatus = ValidationType.partial;
          messages.add(ValidationMessage.error(
              'libimobiledevice and ideviceinstaller are not installed. To install, run:\n'
              '  brew update\n'
              '  brew install --HEAD usbmuxd\n'
              '  brew link usbmuxd\n'
              '  brew install --HEAD libimobiledevice\n'
              '  brew install ideviceinstaller'
          ));
  