Update layout

Author: andrewtelnov

README.md

@@ -79,7 +79,8 @@ To build library yourself:
 
 4.  **Add your own custom widget**
 
-    Please go to [this plunker](https://plnkr.co/edit/HdnYE5?p=preview) and select customwidget.js to review the code and comments
+    Please go to [this plunker](https://plnkr.co/edit/HdnYE5?p=preview) and select customwidget.js to review the code and comments.
+
     The [same plunker example](https://plnkr.co/edit/fXsLf1R88WxxDFaFEnYx?p=preview), but for SurveyJS Editor/Builder
 
 ## License