message: fix(nav): use item text as key
diff: @@ -12,9 +12,9 @@ export class DocsNav {
  toItem = ([text, value]) => {
  switch (typeof value) {
  case 'string':
  - return <li>{this.toLink([text, value])}</li>;
  + return <li key={text}>{this.toLink([text, value])}</li>;
  case 'object':
  - return <li>{this.toSection([text, value])}</li>;
  + return <li key={text}>{this.toSection([text, value])}</li>;
  }
  }
  