diff --git a/aider/utils.py b/aider/utils.py
index ca4d6213d..632a3c85f 100644
--- a/aider/utils.py
+++ b/aider/utils.py
@@ -274,6 +274,7 @@ class Spinner:
 
 import os
 
+
 def find_common_root(abs_fnames):
     if len(abs_fnames) == 1:
         return os.path.dirname(list(abs_fnames)[0])
@@ -282,6 +283,7 @@ def find_common_root(abs_fnames):
     else:
         return os.getcwd()
 
+
 def check_pip_install_extra(io, module, prompt, pip_install_cmd):
     try:
         __import__(module)