[plt-scheme] behavior of nested quotes in DrScheme/mzscheme

I stumbled on this odd bit of behavior just now.  In DrScheme (pretty big Scheme 
language level), evaluating

'''''a

gives

''''a

but in mzscheme it gives

(quote (quote (quote (quote a))))

 From a teaching standpoint, the latter is preferable.  Is there any way to 
tweak DrScheme's display so that it outputs the latter form?

Mike