Fix closed getter (fixes #912)

index.bs

@@ -1300,10 +1300,12 @@ lt="ReadableStreamDefaultReader(stream)">new ReadableStreamDefaultReader(<var>st
 <h5 id="default-reader-closed" attribute for="ReadableStreamDefaultReader" lt="closed">get closed</h5>
 
 <div class="note">
-  The <code>closed</code> getter returns a promise that will be fulfilled when the stream becomes closed or the
-  reader's lock is <a lt="release a read lock">released</a>, or rejected if the stream ever errors.
+  The <code>closed</code> getter returns a promise that will be fulfilled when the stream becomes closed, or rejected if
+  the stream ever errors or the reader's lock is <a lt="release a read lock">released</a> before the stream finishes
+  closing or the stream errors.
 </div>
 
+
 <emu-alg>
   1. If ! IsReadableStreamDefaultReader(*this*) is *false*, return <a>a promise rejected with</a> a *TypeError* exception.
   1. Return *this*.[[closedPromise]].
@@ -3531,7 +3533,7 @@ lt="WritableStreamDefaultWriter(stream)">new WritableStreamDefaultWriter(<var>st
 <div class="note">
   The <code>closed</code> getter returns a promise that will be fulfilled when the stream becomes closed, or rejected if
   the stream ever errors or the writer's lock is <a lt="release a write lock">released</a> before the stream finishes
-  closing.
+  closing or the stream errors.
 </div>
 
 <emu-alg>