Contribution #1720

Problem: ru/2.8.6

Added 2.2.25. 2.5.12, 8.3.15(ru); Updated 2.8.6

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: June 28, 2024 at 10:39 AM

GitHub commit: f90975340a0d88a6950cbdc102fe52f5190db146

+127 -222 lines changed