Previously, code wrote out empty tags for `<DebugInformationFormat>`
like so:

    <DebugInformationFormat></DebugInformationFormat>

This gets corrected by Visual Studio 2017 when saving the solution. The
correction appears as:

    <DebugInformationFormat>
    </DebugInformationFormat>

In the spirit of keeping the XML structure as close to what Visual
Studio expects as possible, a newline is inserted after the opening tag
in the empty case.