Trailing whitespace removal extension. Removes either manually or on file save (enabled by default). Manual whitespace removal could be done through Edit->Advanced menu->Remove Trailing Whitespaces.
Trailing whitespaces are annoying and also git likes to complain about them, that's why extension such as this could be useful.
This version should be functionally the same to https://marketplace.visualstudio.com/items?itemName=Predelnik.RemoveTrailingWhitespaces But should work for VS2019 only currently.