Fix a bunch of typos in documentation, docstrings and comments.
(From SF patch #810751)
diff --git a/Lib/rlcompleter.py b/Lib/rlcompleter.py
index de4c024..1d29167 100644
--- a/Lib/rlcompleter.py
+++ b/Lib/rlcompleter.py
@@ -117,7 +117,7 @@
Assuming the text is of the form NAME.NAME....[NAME], and is
evaluatable in self.namespace, it will be evaluated and its attributes
(as revealed by dir()) are used as possible completions. (For class
- instances, class members are are also considered.)
+ instances, class members are also considered.)
WARNING: this can still invoke arbitrary C code, if an object
with a __getattr__ hook is evaluated.