fix formatting in comment block

Author: chrisvfritz

src/guide/components.md

@@ -1103,9 +1103,9 @@ The factory function receives a `resolve` callback, which should be called when
 
 ``` js
 Vue.component('async-webpack-example', function (resolve) {
-  // this special require syntax will instruct webpack to
+  // This special require syntax will instruct Webpack to
   // automatically split your built code into bundles which
-  // are automatically loaded over ajax requests.
+  // are loaded over Ajax requests.
   require(['./my-async-component'], resolve)
 })
 ```