| C | ↗ | B | category improved |
| ⇢ | B | diffusion::extract_list_categories() added | |
| ⇢ | A | diffusion::extract_first_cat() added | |
| ⇢ | A | diffusion::category_smilies() added | |
| ⇢ | A | listener::category_smilies() added | |
| B | ↗ | A | diffusion::list_cats() improved |
| B | ↛ | category::extract_list_categories() removed |