This lead to wrong, stretched UVs regardless of the ON/OFF state of "Correct Aspect" option (some code in the operator respected this setting properly, whereas it was hardcoded in another part). Before rB9296ba867462, `uvedit_pack_islands_multi` was always called with `correct_aspect` = false for the UnwrapOptions. After rB9296ba867462, `ED_uvedit_pack_islands_multi` was always called with `correct_aspect` = true for the UVPackIsland_Params. Both seem wrong [in that they do not take the operator setting into account]. Now respect that setting [same as the following `uv_map_clip_correct_multi` does as well btw.] Now results match 2.90 [where this was still python] perfectly. Maniphest Tasks: T85194 Differential Revision: https://developer.blender.org/D10246