[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

jupyter_server/serverapp.py

@@ -1639,7 +1639,12 @@ def _update_notebook_dir(self, change):
         self.log.warning(_i18n("notebook_dir is deprecated, use root_dir"))
         self.root_dir = change["new"]
 
-    external_connection_dir = Unicode(None, allow_none=True, config=True, help=_i18n("The directory to look at for external kernel connection files."))
+    external_connection_dir = Unicode(
+        None,
+        allow_none=True,
+        config=True,
+        help=_i18n("The directory to look at for external kernel connection files."),
+    )
 
     root_dir = Unicode(config=True, help=_i18n("The directory to use for notebooks and kernels."))
     _root_dir_set = False

jupyter_server/services/kernels/connection/channels.py

@@ -410,7 +410,10 @@ def disconnect(self):
             )
 
             # start buffering instead of closing if this was the last connection
-            if self.kernel_id in self.multi_kernel_manager._kernel_connections and self.multi_kernel_manager._kernel_connections[self.kernel_id] == 0:
+            if (
+                self.kernel_id in self.multi_kernel_manager._kernel_connections
+                and self.multi_kernel_manager._kernel_connections[self.kernel_id] == 0
+            ):
                 self.multi_kernel_manager.start_buffering(
                     self.kernel_id, self.session_key, self.channels
                 )