Squash leftover Stream references

examples/iterators/backpressure.php

@@ -31,7 +31,7 @@ Loop::run(function () {
         Promise\rethrow(new Coroutine($generator($emitter)));
 
         while (yield $iterator->advance()) {
-            printf("Stream emitted %d\n", $iterator->getCurrent());
+            printf("Emitter emitted %d\n", $iterator->getCurrent());
             yield new Pause(500); // Listener consumption takes 500 ms.
         }
     } catch (\Exception $exception) {

examples/iterators/emitter.php

@@ -29,7 +29,7 @@ Loop::run(function () {
         $iterator = $emitter->getIterator();
 
         while (yield $iterator->advance()) {
-            printf("Stream emitted %d\n", $iterator->getCurrent());
+            printf("Emitter emitted %d\n", $iterator->getCurrent());
             yield new Delayed(100); // Listener consumption takes 100 ms.
         }
     } catch (\Throwable $exception) {

examples/iterators/producer.php

@@ -24,7 +24,7 @@ Loop::run(function () {
         });
 
         while (yield $iterator->advance()) {
-            printf("Stream emitted %d\n", $iterator->getCurrent());
+            printf("Producer emitted %d\n", $iterator->getCurrent());
             yield new Delayed(100); // Listener consumption takes 100 ms.
         }
     } catch (\Exception $exception) {

lib/Emitter.php

@@ -84,7 +84,7 @@ try {
          * prevent IDEs and other tools from reporting multiple definitions.
          */
         eval('namespace Amp;
-        final class Emitter implements Stream {
+        final class Emitter implements Iterator {
             use Internal\Producer { emit as public; complete as public; fail as public; }
             public function getIterator(): Iterator { return $this; }
         }');

lib/Iterator.php

@@ -3,7 +3,7 @@
 namespace Amp;
 
 /**
- * Defines an asynchronous stream that is designed to be used within a coroutine.
+ * Defines an asynchronous iterator over a set of values that is designed to be used within a coroutine.
  */
 interface Iterator {
     /**