Make the world a better place by placing closing /> on a new line (#9699)

_js/examples/markdown.js

@@ -21,7 +21,8 @@ class MarkdownEditor extends React.Component {
         <h3>Input</h3>
         <textarea
           onChange={this.handleChange}
-          defaultValue={this.state.value} />
+          defaultValue={this.state.value}
+        />
         <h3>Output</h3>
         <div
           className="content"