In Visual Studio 2017 I go to Tools > Options > Text Editor > C# > Code Style, and toggle the option "Prefer braces" from yes to no and back.
It does nothing. The preview below the options always has braces regardless of the setting.
Even an explicit .editorconfig file on csharp_prefer_braces = false:none does not change the behavior.
Is this a bug? Or is some other option overriding?