Fix a bunch of typos in documentation, docstrings and comments.
(From SF patch #810751)
diff --git a/Lib/site.py b/Lib/site.py
index 788a94a..e7b9369 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -10,7 +10,7 @@
 import, this is no longer necessary (but code that does it still
 works).
 
-This will append site-specific paths to to the module search path.  On
+This will append site-specific paths to the module search path.  On
 Unix, it starts with sys.prefix and sys.exec_prefix (if different) and
 appends lib/python<version>/site-packages as well as lib/site-python.
 On other platforms (mainly Mac and Windows), it uses just sys.prefix