HeaderStringFormat issue when using Curly Brace next to the beginning quote

I have the following XAML. The idea is to append the text " For Report" after a string that is coming from a bound XML file. ``` <GroupBox Header="{Binding XMLData.Element[HeadingText].Value}" HeaderStringFormat="For Report"> ``` When I add {0} to the beginning of the HeadingStringFormat String like so, the application ignores the HeaderStringFormat and simply puts up the databound value. ``` <GroupBox Header="{Binding XMLData.Element[HeadingText].Value}" HeaderStringFormat="{0} For Report"> ``` However, when I add a single space (or any other character for that matter) after the quote, but prior to the left {, the application works fine. ``` <GroupBox Header="{Binding XMLData.Element[HeadingText].Value}" HeaderStringFormat=" {0} For Report" > ``` In the first example, the editor seems to think that the string (between the quotes) isn't a string anymore, but if I put in that space, it's happy.