tweak comments

src/components/Item.vue

@@ -30,6 +30,7 @@
 export default {
   name: 'news-item',
   props: ['item'],
+  // https://github.com/vuejs/vue/blob/next/packages/vue-server-renderer/README.md#component-caching
   serverCacheKey: props => {
     return `${props.item.id}::${props.item.__lastUpdated}`
   }

src/server-entry.js

@@ -24,7 +24,7 @@ export default context => {
   })).then(() => {
     isDev && console.log(`data pre-fetch: ${Date.now() - s}ms`)
     // After all preFetch hooks are resolved, our store is now
-    // filled with the needed state to render the app.
+    // filled with the state needed to render the app.
     // Expose the state on the render context, and let the request handler
     // inline the state in the HTML response. This allows the client-side
     // store to pick-up the server-side state without having to duplicate