Update app.py

app.py

@@ -224,6 +224,9 @@ def format_story(storydata):
         print(f"## Chapter {ichapter}", end="")
         print(" ##" if chapter_title is None else f": {chapter_title} ##")
         print()
+        output_lines.append(f"## Chapter {ichapter}")
+        output_lines.append(" ##" if chapter_title is None else f": {chapter_title} ##")
+        output_lines.append("")
         if chapter_title is not None:
             output_lines.append(chapter_title)
             #_write_to_file(file, f"{description}")