reasoning_content -> reasoning (#27752)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

vllm/reasoning/deepseek_r1_reasoning_parser.py

@@ -25,7 +25,7 @@ class DeepSeekR1ReasoningParser(BaseThinkingReasoningParser):
         """The token that ends reasoning content."""
         return "</think>"
 
-    def extract_reasoning_content_streaming(
+    def extract_reasoning_streaming(
         self,
         previous_text: str,
         current_text: str,
@@ -34,7 +34,7 @@ class DeepSeekR1ReasoningParser(BaseThinkingReasoningParser):
         current_token_ids: Sequence[int],
         delta_token_ids: Sequence[int],
     ) -> DeltaMessage | None:
-        ret = super().extract_reasoning_content_streaming(
+        ret = super().extract_reasoning_streaming(
             previous_text,
             current_text,
             delta_text,
@@ -51,10 +51,10 @@ class DeepSeekR1ReasoningParser(BaseThinkingReasoningParser):
                 # end token in delta with more tokens,
                 # extract reasoning content and content
                 end_index = delta_text.find(self.end_token)
-                reasoning_content = delta_text[:end_index]
+                reasoning = delta_text[:end_index]
                 content = delta_text[end_index + len(self.end_token) :]
                 return DeltaMessage(
-                    reasoning_content=reasoning_content,
+                    reasoning=reasoning,
                     content=content if content else None,
                 )
             elif self.end_token_id in previous_token_ids:
@@ -62,6 +62,6 @@ class DeepSeekR1ReasoningParser(BaseThinkingReasoningParser):
                 return DeltaMessage(content=delta_text)
             else:
                 # no end token in previous or delta, reasoning content continues
-                return DeltaMessage(reasoning_content=delta_text)
+                return DeltaMessage(reasoning=delta_text)
 
         return ret