message: chore: minor comment cleanup
diff: @@ -49,9 +49,9 @@ export default class Dep {
  }
  }
  -// the current target watcher being evaluated.
  -// this is globally unique because there could be only one
  -// watcher being evaluated at any time.
  +// The current target watcher being evaluated.
  +// This is globally unique because only one watcher
  +// can be evaluated at a time.
  Dep.target = null
  const targetStack = []
  