Update manual test.

tests/plugins/widget/manual/clipboardhtmlselectall.html

@@ -1,31 +1,44 @@
-<div id="editor">
+<h2>At boundaries</h2>
+<div id="editor1">
 	<div data-widget="customwidget">Widget</div>
 	<p>Adipisicing corporis rem repellendus vel mollitia vero? Consectetur dolores voluptatibus illo ipsam eveniet? Lorem ipsum dolor sit amet.</p>
 	<div data-widget="customwidget">Widget</div>
 </div>
 
+<h2>In the middle</h2>
+<div id="editor2">
+	<p>Adipisicing corporis rem repellendus</p>
+	<div data-widget="customwidget">Widget</div>
+	<p>vel mollitia vero? Consectetur dolores voluptatibus illo ipsam eveniet? Lorem ipsum dolor sit amet.</p>
+</div>
+
 <script>
-	if ( bender.env.mobile || !CKEDITOR.env.webkit ) {
-		bender.ignore();
-	}
+	( function() {
+		var editorConfig = {
+			extraAllowedContent: 'span',
+			extraPlugins: 'customwidget',
+			allowedContent: true
+		};
 
-	CKEDITOR.replace( 'editor', {
-		extraAllowedContent: 'span',
-		extraPlugins: 'customwidget',
-		allowedContent: true
-	} );
+		if ( bender.env.mobile || !CKEDITOR.env.webkit ) {
+			bender.ignore();
+		}
 
-	CKEDITOR.plugins.add( 'customwidget', {
-		requires: 'widget',
-		allowedContent: 'div',
+		CKEDITOR.replace( 'editor1', editorConfig );
+		CKEDITOR.replace( 'editor2', editorConfig );
 
-		init: function ( editor )	{
-			var counter = 0;
+		CKEDITOR.plugins.add( 'customwidget', {
+			requires: 'widget',
+			allowedContent: 'div',
 
-			editor.widgets.add( 'customwidget', {
-				button: 'Add widget',
-				template: '<div>Widget</div>'
-			} );
-		}
-	} );
+			init: function ( editor )	{
+				var counter = 0;
+
+				editor.widgets.add( 'customwidget', {
+					button: 'Add widget',
+					template: '<div>Widget</div>'
+				} );
+			}
+		} );
+	}() );
 </script>

tests/plugins/widget/manual/clipboardhtmlselectall.md

@@ -1,10 +1,13 @@
-@bender-tags: 4.13.0, feature, 3138
+@bender-tags: 4.13.0, feature, 3138, 3423
 @bender-ui: collapsed
 @bender-ckeditor-plugins: widget, undo, wysiwygarea, toolbar
 
+For both editors:
+
 1. Open console.
 2. Select all.
-3. Copy
+3. Release all keys.
+4. Copy.
 
 ## Expected