diff --git a/docs/tools/fix_grammar_gpt.py b/docs/tools/fix_grammar_gpt.py
index 43b4b32ce2..8affb9e1c4 100644
--- a/docs/tools/fix_grammar_gpt.py
+++ b/docs/tools/fix_grammar_gpt.py
@@ -109,7 +109,7 @@ def get_chunk_length(chunk: List[str]) -> int:
 
         fmt.note(f"Created {len(chunks)} chunks")
 
-        fixed_chunks: List[List[str]] = []
+        fixed_chunks: List[str] = []
         for chunk in chunks:
             client = OpenAI()
             response = client.chat.completions.create(
@@ -125,8 +125,9 @@ def get_chunk_length(chunk: List[str]) -> int:
 
         with open(file_path, "w", encoding="utf-8") as f:
             for c in fixed_chunks:
-                f.writelines(c)
-                f.writelines([""] * 2)
+                f.write(c)
+                f.write("\n")
+                f.write("\n")
 
     if count == 0:
         fmt.warning("No files selected for grammar check.")