Fix a bunch of typos in documentation, docstrings and comments.
(From SF patch #810751)
diff --git a/Lib/test/test_stringprep.py b/Lib/test/test_stringprep.py
index c116adc..4459689 100644
--- a/Lib/test/test_stringprep.py
+++ b/Lib/test/test_stringprep.py
@@ -71,7 +71,7 @@
# This would generate a hash of all predicates. However, running
# it is quite expensive, and only serves to detect changes in the
# unicode database. Instead, stringprep.py asserts the version of
-# of the database.
+# the database.
# predicates = [k for k in dir(stringprep) if k.startswith("in_table")]
# predicates.sort()