Update docs on %store magic.

IPython/extensions/storemagic.py

@@ -2,17 +2,12 b''
 """
 %store magic for lightweight persistence.
 
-Stores variables, aliases and macros in IPython's database. Stored values will
-be automatically restored whenever the extension is loaded.
+Stores variables, aliases and macros in IPython's database.
 
-To enable this functionality, list it in your default profile
-`ipython_config.py` file::
+To automatically restore stored variables at startup, add this to your
+:file:`ipython_config.py` file::
 
-  c.InteractiveShellApp.extensions = ['storemagic']
-
-Or to use it temporarily, run this in your IPython session::
-
-  %load_ext storemagic
+  c.StoreMagic.autorestore = True
 
 """
 

docs/source/whatsnew/development.txt

@@ -62,8 +62,9 b' New features'
   Terminal frontend by default (:ghpull:`838`).
 
 * **%store**: The ``%store`` magic from earlier versions has been updated and
-  placed in an extension, :ref:`extensions_storemagic`. Add 'storemagic' to ``c.InteractiveShellApp.extensions``
-  in ipython_config.py to enable it (:ghpull:`1029`).
+  re-enabled (:ref:`extensions_storemagic`; :ghpull:`1029`). To autorestore
+  stored variables on startup, specify ``c.StoreMagic.autorestore = True`` in
+  :file:`ipython_config.py`.