diff --git a/aider/utils.py b/aider/utils.py
index 169dddb38..5d73a39e1 100644
--- a/aider/utils.py
+++ b/aider/utils.py
@@ -30,10 +30,10 @@ def run_interactive_command(command):
 
     try:
         # Check if /bin/sh exists
-        if os.path.exists('/bin/sh'):
+        if os.path.exists("/bin/sh"):
             # Use /bin/sh -c if it exists
-            spawn_command = ['/bin/sh', '-c', command]
-            child = pexpect.spawn('/bin/sh', args=['-c', command], encoding="utf-8")
+            spawn_command = ["/bin/sh", "-c", command]
+            child = pexpect.spawn("/bin/sh", args=["-c", command], encoding="utf-8")
         else:
             # Fall back to the original behavior
             spawn_command = command