minor #4931 Remove horizontal scrollbar (ifdattic)

This PR was merged into the 2.3 branch.

Discussion
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Remove horizontal scrollbar

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets |

Commits
-------

0c236b4 Remove horizontal scrollbar

components/event_dispatcher/traceable_dispatcher.rst

@@ -30,7 +30,11 @@ to register event listeners and dispatch events::
     // register an event listener
     $eventListener = ...;
     $priority = ...;
-    $traceableEventDispatcher->addListener('event.the_name', $eventListener, $priority);
+    $traceableEventDispatcher->addListener(
+        'event.the_name',
+        $eventListener,
+        $priority
+    );
 
     // dispatch an event
     $event = ...;