Fix comment typo
diff --git a/Lib/test/test___all__.py b/Lib/test/test___all__.py
index 8a4734c..08df6b2 100644
--- a/Lib/test/test___all__.py
+++ b/Lib/test/test___all__.py
@@ -15,7 +15,7 @@
# caught here. It also leaves a partial pty module in sys.modules.
# So when test_pty is called later, the import of pty succeeds,
# but shouldn't. As a result, test_pty crashes with an
- # AtttributeError instead of an ImportError, and regrtest interprets
+ # AttributeError instead of an ImportError, and regrtest interprets
# the latter as a test failure (ImportError is treated as "test
# skipped" -- which is what test_pty should say on Windows).
try: