System Information
Operating system: windows 10
Graphics card: Nvidia Geforce 1070 ti
Blender Version
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (newest version of Blender that worked as expected)
blender 2.93.2
Short description of error
The subtract brush in weight mode does the exact opposite thing, it add weight, other brush work normally
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
