When I "go to definition" of InterfaceTypeAttribute I see the following:
// Indicates whether a managed interface is dual, dispatch-only, or IUnknown
// -only when exposed to COM.
Note that there's a whitespace right after "IUnknown" so when I hover a mouse over code that contains usage of the attribute I see the following text being displayed: "Indicates whether a managed interface is dual, dispatch-only, or IUnknown -only when exposed to COM." - note a whitespace in front of "only". I'll attach a screenshot of Visual Studio editor showing how it looks like.
Clearly that whitespace is redundant and makes the hint look untidy. It should be eliminated