When submitting bug reports associated with this review, ensure
they are earmarked [REG2.065-b1] or [BUG2.065-b1] for easy
identification, retrieval and merger.
So far I am not finding many bugs in this. But when is the work
on 2.066 going to start? There are many patches. And what's the
focus (if it has one) of D 2.066? I suggest to warn/deprecate all
that should be deprecated (built-in sort, old operator
overloading, etc), and introduce some of the little breaking
changes that we think are good (like implicit joining of adjacent
string literals, etc).