Reformat files ruff format

Author: pwwpche

src/a2a/utils/proto_utils.py

@@ -81,9 +81,7 @@ def file(
     ) -> a2a_pb2.FilePart:
         if isinstance(file, types.FileWithUri):
             return a2a_pb2.FilePart(
-                file_with_uri=file.uri,
-                mime_type=file.mime_type,
-                name=file.name
+                file_with_uri=file.uri, mime_type=file.mime_type, name=file.name
             )
         return a2a_pb2.FilePart(
             file_with_bytes=file.bytes.encode('utf-8'),

tests/utils/test_proto_utils.py

@@ -25,7 +25,7 @@ def sample_message() -> types.Message:
                     file=types.FileWithUri(
                         uri='file:///test.txt',
                         name='test.txt',
-                        mime_type="text/plain",
+                        mime_type='text/plain',
                     ),
                 )
             ),