Post final-QA

Author: bzaczynski

fastapi/README.md

@@ -4,12 +4,12 @@ This repository contains code snippets discussed in the associated tutorial [Get
 
 ## Installation
 
-The recommended way to install FastAPI is with the `[standard]` extra dependencies. This ensures you get all the tools you need for developing an API without having to hunt down additional packages later:
+The recommended way to install FastAPI is with the [`[standard]`](https://github.com/fastapi/fastapi/blob/16d75d90eb96976a57b94cc24e4018859cd54c4d/pyproject.toml#L60) extra dependencies. This ensures you get all the tools you need for developing an API without having to hunt down additional packages later:
 
 ```console
 $ python -m pip install "fastapi[standard]"
 ```
 
-The quotes around `"fastapi[standard]"` ensure the command works correctly across different [terminals](https://realpython.com/terminal-commands/) and operating systems. With the command above, you install several useful packages, including the [FastAPI CLI](https://fastapi.tiangolo.com/fastapi-cli/) and [uvicorn](https://www.uvicorn.org/), an ASGI server for running your application.
+The quotes around `"fastapi[standard]"` ensure the command works correctly across different [terminals](https://realpython.com/terminal-commands/) and operating systems. With the command above, you install several useful packages, including the [FastAPI CLI](https://fastapi.tiangolo.com/fastapi-cli/) and [uvicorn](https://www.uvicorn.org/), an [ASGI](https://en.wikipedia.org/wiki/Asynchronous_Server_Gateway_Interface) server for running your application.
 
 You can also use the `requirements.txt` file in this folder and run `python -m pip install -r requirements.txt` to install the standard dependencies of FastAPI.

fastapi/main.py

@@ -1,5 +1,3 @@
-from typing import Optional
-
 from pydantic import BaseModel
 
 from fastapi import FastAPI
@@ -24,7 +22,7 @@ class Book(BaseModel):
 
 
 @app.get("/books")
-def get_books(limit: Optional[int] = None):
+def get_books(limit: int | None = None):
     """Get all books, optionally limited by count."""
     if limit:
         return {"books": books[:limit]}