Typo fix
diff --git a/Objects/dictnotes.txt b/Objects/dictnotes.txt
index b0e59a7..3b63197 100644
--- a/Objects/dictnotes.txt
+++ b/Objects/dictnotes.txt
@@ -44,7 +44,7 @@
d.setdefault(word, []).append(pagenumber)
Note, the second example is a use case characterized by a get and set
- to the same key. There are similar used cases with a __contains__
+ to the same key. There are similar use cases with a __contains__
followed by a get, set, or del to the same key. Part of the
justification for d.setdefault is combining the two lookups into one.