Is setting the pretokenise flag advisable?

It doesn't seem to work from the console neither from the IDE.
After

E.setFlags({pretokenise:1})
function test() {print('Hallo')}
dump()

function test ... is shown as plain text, no tokens.
The output of E.getFlags() is

>E.getFlags()
={ deepSleep: 0, pretokenise: 1, unsafeFlash: 0, unsyncFiles: 0 }

Version is 2v02, Espruino Wifi.
There seems to be something I'm missing.