fix(sse): small improvement to handling server-sent events (#11)

Author: stainless-bot

src/finch/_base_client.py

@@ -626,7 +626,7 @@ def _process_response_data(
 
     def _process_stream_line(self, contents: str) -> str:
         """Pre-process an indiviudal line from a streaming response"""
-        if contents == "data: [DONE]\n":
+        if contents.startswith("data: [DONE]"):
             raise StopStreaming()
 
         if contents.startswith("data: "):