Fix typos
diff --git a/Doc/library/shelve.rst b/Doc/library/shelve.rst
index cc2c1f0..de12420 100644
--- a/Doc/library/shelve.rst
+++ b/Doc/library/shelve.rst
@@ -44,8 +44,8 @@
determine which accessed entries are mutable, nor which ones were actually
mutated).
- Like file objects, shelve objects should closed explicitly to assure
- that the peristent data is flushed to disk.
+ Like file objects, shelve objects should be closed explicitly to ensure
+ that the persistent data is flushed to disk.
Since the :mod:`shelve` module stores objects using :mod:`pickle`, the same
security precautions apply. Accordingly, you should avoid loading a shelf