message: chore: fix prefixed data properties warning typo
diff: @@ -28,7 +28,7 @@ if (process.env.NODE_ENV !== 'production') {
  warn(
  `Property "${key}" must be accessed with "$data.${key}" because ` +
  'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
  - 'prevent conflicts with Vue internals' +
  + 'prevent conflicts with Vue internals. ' +
  'See: https://vuejs.org/v2/api/#data',
  target
  )
  