asyncio: Fix misc whitespace issues.
diff --git a/Lib/asyncio/streams.py b/Lib/asyncio/streams.py
index bd77cab..06f052a 100644
--- a/Lib/asyncio/streams.py
+++ b/Lib/asyncio/streams.py
@@ -14,6 +14,7 @@
 
 _DEFAULT_LIMIT = 2**16
 
+
 class IncompleteReadError(EOFError):
     """
     Incomplete read error. Attributes: