diff --git a/IPython/sphinxext/ipython_directive.py b/IPython/sphinxext/ipython_directive.py
index e55ba12..c428e79 100644
--- a/IPython/sphinxext/ipython_directive.py
+++ b/IPython/sphinxext/ipython_directive.py
@@ -981,8 +981,9 @@ class IPythonDirective(Directive):
         self.shell.warning_is_error = warning_is_error
 
         # setup bookmark for saving figures directory
-        self.shell.process_input_line('bookmark ipy_savedir "%s"'%savefig_dir,
-                                      store_history=False)
+        self.shell.process_input_line(
+            'bookmark ipy_savedir "%s"' % savefig_dir, store_history=False
+        )
         self.shell.clear_cout()
 
         return rgxin, rgxout, promptin, promptout