fix test for windows

aider/coders/base_coder.py

@@ -821,6 +821,7 @@ class Coder:
 
         exhausted = False
         interrupted = False
+        try:
             while True:
                 try:
                     yield from self.send(messages, functions=self.functions)
@@ -851,7 +852,7 @@ class Coder:
                     self.io.tool_error(f"Unexpected error: {err}")
                     traceback.print_exc()
                     return
-
+        finally:
             if self.mdstream:
                 self.live_incremental_response(True)