TemporaryFileWrapper: fixed typo in new comment.
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index d488063..417b749 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -130,7 +130,7 @@
"""
# Cache the unlinker so we don't get spurious errors at shutdown
- # when the module-level "os" in None'd out. Note that this must
+ # when the module-level "os" is None'd out. Note that this must
# be referenced as self.unlink, because the name TemporaryFileWrapper
# may also get None'd out before __del__ is called.
unlink = os.unlink