[Moin-user] [[BR]] vs <<BR>>

[skip at pobox.com]

    Rick> Not to worry, the upgrade script handles converting all built-in
    Rick> macros from [[ to <<.  There's also very good reasons for this
    Rick> change, so I highly doubt you'll get it back the old way (without
    Rick> simply sticking with the old version, haha!).

The release page at http://moinmo.in/MoinMoinRelease1.6 doesn't explain this
change (it just says "new macro markup").  Can you point me to an
explanation for the change?

Thx,

Skip Montanaro