enter review comments (#4553)

Author: keharper

guides/v2.3/graphql/reference/quote-add-simple-products.md

@@ -26,7 +26,7 @@ The following example adds a simple product to a cart. The response contains the
 mutation {
   addSimpleProductsToCart(
     input: {
-      cart_id: "IeTUiU0oCXjm0uRqGCOuhQ2AuQatogjG",
+      cart_id: "IeTUiU0oCXjm0uRqGCOuhQ2AuQatogjG"
       cart_items: [
         {
           data: {

guides/v2.3/graphql/reference/quote-update-cart-items.md

@@ -14,7 +14,7 @@ Setting the quantity to `0` removes an item from the cart.
 
 ## Example usage
 
-The following example changes the quantity of cart item `13` to `3`.
+The following example changes the quantity of cart item `13`. The new quantity is `3`.
 
 **Request**