Update documentation_style_guide.md with new guideline

Change style guideline for multiline comments to use // reesolving #6332

contributor_docs/documentation_style_guide.md

@@ -196,24 +196,35 @@ let magicWord = 'Please';
 let magicWord = 'Please';
 ```
 
-- Use `/** ... */` for multiline comments.
+- Use `//` for multiline comments.
 
 ```javascript
-// Bad.
-// I will not use // for multiline comments.
-// I will not use // for multiline comments.
-// I will not use // for multiline comments.
-// I will not use // for multiline comments.
-// I will not use // for multiline comments.
 
-// Good.
+// Bad.
 /**
- * I will not use // for multiline comments.
- * I will not use // for multiline comments.
- * I will not use // for multiline comments.
- * I will not use // for multiline comments.
- * I will not use // for multiline comments.
+ * I will use // for multiline comments.
+ * I will use // for multiline comments.
+ * I will use // for multiline comments.
+ * I will use // for multiline comments.
+ * I will use // for multiline comments.
+ */
+
+//Bad.
+/*
+ I will use // for multiline comments.
+ I will use // for multiline comments.
+ I will use // for multiline comments.
+ I will use // for multiline comments.
+ I will use // for multiline comments.
  */
+
+// Good.
+// I will use // for multiline comments.
+// I will use // for multiline comments.
+// I will use // for multiline comments.
+// I will use // for multiline comments.
+// I will use // for multiline comments.
+
 ```
 
 **[⬆ back to top](#table-of-contents)**
@@ -1204,4 +1215,4 @@ function preload() {
 }
 ```
 
-**[⬆ back to top](#table-of-contents)**
+**[⬆ back to top](#table-of-contents)**