Chore: Code formatting (#594)

## About
A few cosmetic adjustments aka. code formatting.
Also validate the outcome on CI/GHA.
Feel free to improve now or later at your disposal.

## Details
The updates are based on using the most recent versions of pyproject-fmt
and ruff.
Specifically, spots marked with `noqa` might need further love, also at
your disposal.

---------

Co-authored-by: Kenneth Reitz <me@kennethreitz.org>

examples/lifespan.py

@@ -8,10 +8,8 @@ import responder
 @asynccontextmanager
 async def lifespan(app):
     # Startup: initialize resources
-    print("Starting up...")
     yield
     # Shutdown: clean up resources
-    print("Shutting down...")
 
 
 api = responder.API(lifespan=lifespan)

examples/rest_api.py

@@ -1,8 +1,9 @@
 # Complete REST API example with Pydantic validation.
 # https://responder.kennethreitz.org/tutorial-rest.html
-import responder
 from pydantic import BaseModel
 
+import responder
+
 
 class BookIn(BaseModel):
     title: str
@@ -35,8 +36,13 @@ def list_books(req, resp):
     resp.media = list(books_db.values())
 
 
-@api.route("/books", methods=["POST"], check_existing=False,
-           request_model=BookIn, response_model=BookOut)
+@api.route(
+    "/books",
+    methods=["POST"],
+    check_existing=False,
+    request_model=BookIn,
+    response_model=BookOut,
+)
 async def create_book(req, resp):
     global next_id
     data = await req.media()

examples/websocket_chat.py

@@ -35,7 +35,7 @@ def index(req, resp):
       </script>
     </body>
     </html>
-    """
+    """  # noqa: E501
 
 
 @api.route("/chat", websocket=True)
@@ -47,7 +47,7 @@ async def chat(ws):
             message = await ws.receive_text()
             for client in connected:
                 await client.send_text(message)
-    except Exception:
+    except Exception:  # noqa: S110
         pass
     finally:
         connected.discard(ws)