Make linter hppy

cherry_picker/cherry_picker.py

@@ -109,7 +109,6 @@ def __init__(
         chosen_config_path=None,
         auto_pr=True,
     ):
-
         self.chosen_config_path = chosen_config_path
         """The config reference used in the current runtime.
 
@@ -239,15 +238,12 @@ def checkout_branch(self, branch_name, *, create_branch=False):
         try:
             self.run_cmd(cmd)
         except subprocess.CalledProcessError as err:
-            click.echo(
-                f"Error checking out the branch {checked_out_branch!r}."
-            )
+            click.echo(f"Error checking out the branch {checked_out_branch!r}.")
             click.echo(err.output)
             raise BranchCheckoutException(checked_out_branch)
         if create_branch:
             self.unset_upstream(checked_out_branch)
 
-
     def get_commit_message(self, commit_sha):
         """
         Return the commit message for the current commit hash,