improve gguf-function-calling parser

Author: okaris

llama_cpp/llama_chat_format.py

@@ -4294,11 +4294,11 @@ def gguf_function_calling(
     )
         # Decide initial grammar: message only, functions only, or message+functions
     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"
-        """
+    root ::= message | function_calls | message_then_functions
+    message ::= "message:"
+    function_calls ::= "<function_calls>\\n"
+    message_then_functions ::= "message:" "<function_calls>\\n"
+    """
     completion = cast(
         llama_types.CreateCompletionResponse,
         llama.create_completion(