Polish.

packages/aws-cdk-lib/aws-cloudfront/README.md

@@ -597,12 +597,12 @@ function handler(event) {
   // …
   return {
     statusCode: 302, statusDescription: 'Found', 
-    headers: { location: { value: 'https://www.example.com/' } }, // %DEFAULT_REDIRECT% is replaced during CDK synth
+    headers: { location: { value: 'https://www.example.com/' } }, // https://www.example.com/ is replaced during CDK synth
   }
 }
 ```
 
-> **Note:** This is simple find and replace, like that of a non-intelligent text 
+> **Note:** This is a simple find and replace, like that of a non-intelligent text 
 > editor. The CDK does not look for whole identifiers, strings, or words. The
 > CDK replaces anything in your code that matches `find` regardless of its context.
 >
@@ -675,12 +675,12 @@ new cloudfront.Function(this, 'Function', {
 
 In your CloudFront function, put `%KVS_ID%` where you would normally put the key value store ID.
 
-```ts
+```js
 import cf from 'cloudfront';
 const kvsId = "%KVS_ID%";
 const kvsHandle = cf.kvs(kvsId);
 
-function handler(event) {
+async function handler(event) {
   // …
 }
 ```