run autoformat

apologies to anyone finding this commit via git blame or log

run the autoformatting by

    pre-commit run --all-files

examples/spawn-form/jupyterhub_config.py

@@ -5,6 +5,7 @@ import shlex
 
 from jupyterhub.spawner import LocalProcessSpawner
 
+
 class DemoFormSpawner(LocalProcessSpawner):
     def _options_form_default(self):
         default_env = "YOURNAME=%s\n" % self.user.name
@@ -13,34 +14,37 @@ class DemoFormSpawner(LocalProcessSpawner):
         <input name="args" placeholder="e.g. --debug"></input>
         <label for="env">Environment variables (one per line)</label>
         <textarea name="env">{env}</textarea>
-        """.format(env=default_env)
-    
+        """.format(
+            env=default_env
+        )
+
     def options_from_form(self, formdata):
         options = {}
         options['env'] = env = {}
-        
+
         env_lines = formdata.get('env', [''])
         for line in env_lines[0].splitlines():
             if line:
                 key, value = line.split('=', 1)
                 env[key.strip()] = value.strip()
-        
+
         arg_s = formdata.get('args', [''])[0].strip()
         if arg_s:
             options['argv'] = shlex.split(arg_s)
         return options
-    
+
     def get_args(self):
         """Return arguments to pass to the notebook server"""
         argv = super().get_args()
         if self.user_options.get('argv'):
             argv.extend(self.user_options['argv'])
         return argv
-    
+
     def get_env(self):
         env = super().get_env()
         if self.user_options.get('env'):
             env.update(self.user_options['env'])
         return env
 
+
 c.JupyterHub.spawner_class = DemoFormSpawner