Update app.py

app.py

@@ -19,7 +19,7 @@ def process_ebook(ebook_file):
     input_files_str = "\n".join(input_files_list)
     
     # Print the list of input files in the terminal
-    print("Files in input_files folder:[", input_files_str "]")
+    print(f"Files in input_files folder:[, {input_files_str} ")
     
     if not os.listdir("input_files"):
         raise FileNotFoundError("The folder 'input_files' is empty.")