Update app.py

app.py

@@ -73,18 +73,18 @@ def langchain_document_loader():
         TMP_DIR.as_posix(), glob="**/*.txt", loader_cls=TextLoader, show_progress=True
     )
     documents.extend(txt_loader.load())
-"""
+    """
     pdf_loader = DirectoryLoader(
         TMP_DIR.as_posix(), glob="*.pdf", loader_cls=PyPDFLoader, show_progress=True
     )
     documents.extend(pdf_loader.load())
-"""
+    """
     csv_loader = DirectoryLoader(
         TMP_DIR.as_posix(), glob="**/*.csv", loader_cls=CSVLoader, show_progress=True,
         loader_kwargs={"encoding":"utf8"}
     )
     documents.extend(csv_loader.load())
-"""
+    """
     doc_loader = DirectoryLoader(
         TMP_DIR.as_posix(),
         glob="**/*.docx",