#23700: fix/improve comment
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index cb18ae6..5eafc1f 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -427,8 +427,10 @@
# iter() doesn't use __getattr__ to find the __iter__ method
def __iter__(self):
# Don't return iter(self.file), but yield from it to avoid closing
- # file as long as it's being used as iterator, see issue #23000.
- # XXX Also don't use "yield from"!
+ # file as long as it's being used as iterator (see issue #23700). We
+ # can't use 'yield from' here because iter(file) returns the file
+ # object itself, which has a close method, and thus the file would get
+ # closed when the generator is finalized, due to PEP380 semantics.
for line in self.file:
yield line