Documentation on the new 4.20 title textures is incorrect
On the XFWM4 documentation page on styling (https://wiki.xfce.org/howto/xfwm4_theme), the documentation on 4.20's new texture names is incorrect. The table in the section says that the top title textures would be top-active, top-active-stretch, for the inactive counterparts, this would be top-inactive, and top-inactive stretch. These names are incorrect, and since the names are incorrect, putting in the files with these names in an actual XFWM4 theme makes them not display (which should be pretty obvious).
The actual names for these files would be title-active, title-active-stretch, and for inactive windows, title-inactive, and title-inactive stretch.