In response to review

Author: KathleenDollard

src/System.CommandLine.Subsystems/Directives/DiagramSubsystem.cs

@@ -35,6 +35,7 @@ internal static StringBuilder Diagram(ParseResult parseResult)
         var builder = new StringBuilder(100);
 
 
+        // TODO: Reinstate this when ready to implement
         //Diagram(builder, parseResult.RootCommandResult, parseResult);
 
         // TODO: Unmatched tokens