Repaired typos in comments.

Lib/dumbdbm.py

@@ -39,7 +39,7 @@ class _Database(UserDict.DictMixin):
     # gets called.  One place _commit() gets called is from __del__(),
     # and if that occurs at program shutdown time, module globals may
     # already have gotten rebound to None.  Since it's crucial that
-    # _commit() finish sucessfully, we can't ignore shutdown races
+    # _commit() finish successfully, we can't ignore shutdown races
     # here, and _commit() must not reference any globals.
     _os = _os       # for _commit()
     _open = _open   # for _commit()

Misc/NEWS

@@ -42,7 +42,7 @@ Library
   on-disk data and directory files can be left in mutually inconsistent
   states.  dumbdbm.py's _Database.__del__() method attempted to close
   the database properly, but a shutdown race in _Database._commit()
-  could prevent this form working, so that a program trusting __del__()
+  could prevent this from working, so that a program trusting __del__()
   to get the on-disk files in synch could be badly surprised.  The race
   has been repaired.