change extend to append to prevent newline bug on chunk_by_document

Author: emcf

thepipe/chunker.py

@@ -37,7 +37,7 @@ def chunk_by_document(chunks: List[Chunk]) -> List[Chunk]:
         doc_texts = []
         doc_images = []
         for chunk in doc_chunks:
-            doc_texts.extend(chunk.text)
+            doc_texts.append(chunk.text)
             doc_images.extend(chunk.images)
         text = "\n".join(doc_texts) if doc_texts else None
         new_chunks.append(Chunk(path=doc_chunks[0].path, text=text, images=doc_images))