missing None for optional field + pylint

lbrynet/stream/assembler.py

@@ -30,7 +30,7 @@ async def get_next_available_file_name(loop: asyncio.BaseEventLoop, download_dir
 
 class StreamAssembler:
     def __init__(self, loop: asyncio.BaseEventLoop, blob_manager: 'BlobFileManager', sd_hash: str,
-                 output_file_name: typing.Optional[str]):
+                 output_file_name: typing.Optional[str] = None):
         self.output_file_name = output_file_name
         self.loop = loop
         self.blob_manager = blob_manager

lbrynet/stream/stream_manager.py

@@ -157,7 +157,7 @@ class StreamManager:
 
     async def resume(self):
         if self.node:
-           await self.node.joined.wait()
+            await self.node.joined.wait()
         else:
             log.warning("no DHT node given, resuming downloads trusting that we can contact reflector")
         t = [