Feedback on page SDL3/CategoryRender

[Daniel-Ros]

There seems to be some leftover copy and paste from the SDL2 documentations.

One of the new features in SDL3 that has been stated is the support of polygons via the renderer, but later it says that if I need polygon support I should chose other options ( it is not very clear).

And if we are on this subject, is the polygons are rendered with SDL_RenderGeometry? if so, should it be stated also on the SDL2 page?