docs(readme): minor typo fixes (#577)

Co-authored-by: Robert Craigie <[email protected]>

README.md

@@ -138,7 +138,7 @@ This SDK provides beta support for the [Message Batches API](https://docs.anthro
 
 ### Creating a batch
 
-Message Batches take the exact same request params as the standard Messages API:
+Message Batches takes an array of requests, where each object has a `custom_id` identifier, and the exact same request `params` as the standard Messages API:
 
 ```ts
 await anthropic.beta.messages.batches.create({
@@ -272,7 +272,7 @@ Note that requests which time out will be [retried twice by default](#retries).
 ## Auto-pagination
 
 List methods in the Anthropic API are paginated.
-You can use `for await … of` syntax to iterate through items across all pages:
+You can use the `for await … of` syntax to iterate through items across all pages:
 
 ```ts
 async function fetchAllBetaMessagesBatches(params) {
@@ -285,7 +285,7 @@ async function fetchAllBetaMessagesBatches(params) {
 }
 ```
 
-Alternatively, you can make request a single page at a time:
+Alternatively, you can request a single page at a time:
 
 ```ts
 let page = await client.beta.messages.batches.list({ limit: 20 });