message: example: add content editable
diff: @@ -218,10 +218,17 @@ app.start(document.body, state, view);
  `
  },
  {
  - name: 'Ref - Set Focus',
  - code: `// Ref - Set Focus
  -const ref = e => e.focus()
  -const View = () => <input ref={ref}/>
  + name: 'Ref - Examples',
  + code: `// Ref - Examples
  +const focus = e => e.focus()
  +const edit = e => e.setAttribute('contenteditable', 'true');
  +const View = () => <>
  + <input ref={focus}/>
  + <hr />
  + <div ref={edit} style="height:100px; width:100%">
  + This text is editable. Click to edit.
  + </div>
  +</>;
  app.render(document.body, <View />);
  `
  