Re: [streams] Reader fixups (#262)

> @@ -558,8 +558,13 @@ Instances of <code>ReadableStream</code> are created with the internal slots des
>  </div>
>  
>  <ol>
> -  <li> If <b>this</b>@\[[reader]] is not <b>undefined</b>, return <b>this</b>@\[[reader]]@\[[lockReleased]].
> -  <li> Return <b>this</b>@\[[readyPromise]].
> +  <li> If <b>this</b>@\[[readableStreamReader]] is not <b>undefined</b>, return the result of transforming
> +    <b>this</b>@\[[readableStreamReader]]@\[[lockReleased]] by a fulfillment handler that returns <b>this</b>@\[[readyPromise]].
> +  <li> Return the result of transforming <b>this</b>@\[[readyPromise]] by the following fulfillment handler:
> +    <ol>
> +      <li> If <b>this</b>@\[[readableStreamReader]] is <b>undefined</b>, return <b>undefined</b>.
> +      <li> Otherwise, return <b>this</b>@\[[readableStreamReader]]@\[[lockReleased]].
> +    </ol>

Ah, I see. I think this is analogous to the case without any reader involved:

```js
stream.ready.then(() => console.log(stream.state));

// enqueue a chunk
stream.read();

// will log "waiting"
```

This is somewhat of a more general problem. (If it is a problem.) I will open a new bug to discuss it, although it might be fine to leave as-is.

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