-@pprCoreBinding@ and @pprCoreExpr@ let you give special printing
-function for ``major'' val_bdrs (those next to equal signs :-),
-``minor'' ones (lambda-bound, case-bound), and bindees. They would
-usually be called through some intermediary.
-
-The binder/occ printers take the default ``homogenized'' (see
-@PprEnv@...) @Doc@ and the binder/occ. They can either use the
-homogenized one, or they can ignore it completely. In other words,
-the things passed in act as ``hooks'', getting the last word on how to
-print something.
-