diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 681e8b080..29256f3fa 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -63,8 +63,16 @@ class ChatChunks:
     reminder: List = field(default_factory=list)
 
     def all_messages(self):
-        return (self.system + self.examples + self.done + self.repo +
-                self.readonly_files + self.chat_files + self.cur + self.reminder)
+        return (
+            self.system
+            + self.examples
+            + self.done
+            + self.repo
+            + self.readonly_files
+            + self.chat_files
+            + self.cur
+            + self.reminder
+        )
 
 
 class Coder: