[3.10] Remove trailing spaces (GH-28709)

diff --git a/Lib/typing.py b/Lib/typing.py
index 8590830..f842fc2 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -99,7 +99,7 @@
     'NamedTuple',  # Not really a type.
     'TypedDict',  # Not really a type.
     'Generator',
- 
+
     # Other concrete types.
     'BinaryIO',
     'IO',