See about so-called "clean" canonical nodes.
----
Changes:
Copied omake-branches/0.9.8.x.case/ (from rev 10749, omake-branches/0.9.8.x)
A hyperlinked version of this commit is available at
http://svn.metaprl.org/commitlogs/omake/2007-05.html#07/05/17.15:43:46