Fix #1933: Format code with ruff

Author: 717986230

src/mcp/server/stdio.py

@@ -30,7 +30,10 @@ async def run_server():
 
 
 @asynccontextmanager
-async def stdio_server(stdin: anyio.AsyncFile[str] | None = None, stdout: anyio.AsyncFile[str] | None = None):
+async def stdio_server(
+    stdin: anyio.AsyncFile[str] | None = None,
+    stdout: anyio.AsyncFile[str] | None = None,
+):
     """Server transport for stdio: this communicates with an MCP client by reading
     from the current process' stdin and writing to stdout.
     """
@@ -44,22 +47,28 @@ async def stdio_server(stdin: anyio.AsyncFile[str] | None = None, stdout: anyio.
     if not stdin:
         stdin_fd = os.dup(sys.stdin.fileno())
         stdin_bin = os.fdopen(stdin_fd, "rb", closefd=True)
-        stdin = anyio.wrap_file(TextIOWrapper(stdin_bin, encoding="utf-8", errors="replace"))
-    
+        stdin = anyio.wrap_file(
+            TextIOWrapper(stdin_bin, encoding="utf-8", errors="replace")
+        )
+
     if not stdout:
         stdout_fd = os.dup(sys.stdout.fileno())
         stdout_bin = os.fdopen(stdout_fd, "wb", closefd=True)
         stdout = anyio.wrap_file(TextIOWrapper(stdout_bin, encoding="utf-8"))
 
-    read_stream_writer, read_stream = create_context_streams[SessionMessage | Exception](0)
+    read_stream_writer, read_stream = create_context_streams[
+        SessionMessage | Exception
+    ](0)
     write_stream, write_stream_reader = create_context_streams[SessionMessage](0)
 
     async def stdin_reader():
         try:
             async with read_stream_writer:
                 async for line in stdin:
                     try:
-                        message = types.jsonrpc_message_adapter.validate_json(line, by_name=False)
+                        message = types.jsonrpc_message_adapter.validate_json(
+                            line, by_name=False
+                        )
                     except Exception as exc:
                         await read_stream_writer.send(exc)
                         continue
@@ -73,7 +82,9 @@ async def stdout_writer():
         try:
             async with write_stream_reader:
                 async for session_message in write_stream_reader:
-                    json = session_message.message.model_dump_json(by_alias=True, exclude_unset=True)
+                    json = session_message.message.model_dump_json(
+                        by_alias=True, exclude_unset=True
+                    )
                     await stdout.write(json + "\n")
                     await stdout.flush()
         except anyio.ClosedResourceError:  # pragma: no cover