Fix a bunch of typos in documentation, docstrings and comments.
(From SF patch #810751)
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 028ec08..d5f4774 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -1,6 +1,6 @@
# As a test suite for the os module, this is woefully inadequate, but this
# does add tests for a few functions which have been determined to be more
-# more portable than they had been thought to be.
+# portable than they had been thought to be.
import os
import unittest