Remove superfluous xml termination character

Author: tommcdon

xml/System.Diagnostics/Debugger.xml

@@ -226,7 +226,7 @@ Console.WriteLine("Hello, world.");
           <format type="text/markdown"><![CDATA[
 
             ## Remarks
-            This API is designed to be used with <xref:System.Diagnostics.DebuggerDisableUserUnhandledExceptionsAttribute>. If a .NET debugger is attached and the debugger supports breaking on user-unhandled exceptions, this method signals a breakpoint to the debugger with the `exception` parameter. />
+            This API is designed to be used with <xref:System.Diagnostics.DebuggerDisableUserUnhandledExceptionsAttribute>. If a .NET debugger is attached and the debugger supports breaking on user-unhandled exceptions, this method signals a breakpoint to the debugger with the `exception` parameter.
             ]]></format>
         </remarks>
       </Docs>