[mergen3107]

@NiLuJe

WOW!! Thank you so much! That did the trick.

I attach models.py and a screenshot showing white spaces as they should appear (somehow Notepad++ auto-indents with tab spaces when pasting, not white spaces).

P.S. I only tested --update, --delete, and --folder options for ./generate_collections. They all work and Kindle shows proper output 'Done in XX s'.