style: Remove trailing whitespace in base_prompts.py

Author: paul-gauthier

aider/coders/base_prompts.py

@@ -14,7 +14,7 @@ class CoderPrompts:
 You always COMPLETELY IMPLEMENT the needed code!
 """
 
-    overeager_prompt = """Pay careful attention to the scope of the user's request. 
+    overeager_prompt = """Pay careful attention to the scope of the user's request.
 Do what they ask, but no more."""
 
     example_messages = []