File psl-1983/util/useful.build artifact fbb85a415c part of check-in d9e362f11e

CompileTime load Useful;
in "backquote.sl"$
in "read-macros.sl"$
in "destructure.sl"$
in "cond-macros.sl"$
in "bind-macros.sl"$
in "set-macros.sl"$
in "iter-macros.sl"$
in "for-macro.sl"$
in "misc-macros.sl"$
in "macroexpand.sl"$