diff --git a/aider/io.py b/aider/io.py
index b6b7d5820..38d900a8e 100644
--- a/aider/io.py
+++ b/aider/io.py
@@ -320,6 +320,7 @@ class InputOutput:
                 return f.read()
         except OSError as err:
             import traceback
+
             self.tool_error(f"{filename}: unable to read: {err}")
             self.tool_error("Traceback:\n" + "".join(traceback.format_stack()))
             return