feat(func_call): Add more check in BaseFormatDetector.parse_streaming_increment (sgl-project#7479)

Author: CatherineSue

python/sglang/srt/function_call/base_format_detector.py

@@ -142,6 +142,10 @@ def parse_streaming_increment(
             try:
                 if current_text.startswith(self.bot_token):
                     start_idx = len(self.bot_token)
+                elif self.current_tool_id > 0 and current_text.startswith(
+                    self.tool_call_separator + self.bot_token
+                ):
+                    start_idx = len(self.tool_call_separator + self.bot_token)
                 elif self.current_tool_id > 0 and current_text.startswith(
                     self.tool_call_separator
                 ):

test/srt/openai_server/function_call/test_tool_choice.py

@@ -468,10 +468,7 @@ class TestToolChoiceQwen25(TestToolChoiceLlama32):
 
     @classmethod
     def setUpClass(cls):
-        cls.flaky_tests = {
-            "test_multi_tool_scenario_auto",
-            "test_multi_tool_scenario_required",
-        }
+        cls.flaky_tests = {}
 
         cls.model = "Qwen/Qwen2.5-7B-Instruct"
         cls.base_url = DEFAULT_URL_FOR_TEST