message: Sort idlSources alphabetically
diff: "url": "https://storage.spec.whatwg.org/",
  "title": "Storage"
  },
  + {
  + "url": "https://streams.spec.whatwg.org/",
  + "title": "Streams"
  + },
  {
  "url": "https://svgwg.org/svg2-draft/types.html",
  "title": "SVG - Basic Data Types and Interfaces"
  {
  "url": "https://html.spec.whatwg.org/multipage/web-messaging.html",
  "title": "Web Messaging"
  - },
  - {
  - "url": "https://streams.spec.whatwg.org/",
  - "title": "Streams"
  }
  ]
  