Fix a bunch of typos in documentation, docstrings and comments.
(From SF patch #810751)
diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index a38c911..7fb84b4 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -497,7 +497,7 @@
#
# After a little research (reading man pages on various unixen, and
# digging through the linux kernel), I've determined that select()
-# isn't meant for doing doing asynchronous file i/o.
+# isn't meant for doing asynchronous file i/o.
# Heartening, though - reading linux/mm/filemap.c shows that linux
# supports asynchronous read-ahead. So _MOST_ of the time, the data
# will be sitting in memory for us already when we go to read it.