improve gguf-function-calling parser

Author: okaris

llama_cpp/llama_chat_format.py

@@ -4296,8 +4296,8 @@ def gguf_function_calling(
     initial_gbnf_tool_grammar = """
     root ::= message | function_calls | message_then_functions
     message ::= "message:"
-    function_calls ::= "<function_calls>\\n"
-    message_then_functions ::= "message:" "<function_calls>\\n"
+    function_calls ::= "<function_calls>"
+    message_then_functions ::= "message:" "<function_calls>"
     """
     completion = cast(
         llama_types.CreateCompletionResponse,