"(FOO . #)", where # is splicing macro

[JONL at MIT-MC (Jon L White)]

1) The bug whereby "(FOO . )" produces "(FOO . #51)", or
   whereby "(FOO . #)" with # a splicing macro returning ()
   produces the same lossage, is fixed by inserting at RDLST4
	JUMPE T,ER2
2) The bug whereby "(FOO . #)" produces "(FOO BAR . #51)",  where # is
   a splicing macro returning "(BAR)", is fixed by replacing the two
   lines at RDLS4A+4,5 with
	HRRZ AR2A,(A)
	JUMPE AR2A,ER2
	HLRZ AR2A,(A)
	HRRM A,(TT)
	JRST RDLS4B
   This will cause the example to produce "(FOO . BAR)" in accord with
   ALAN's expectations.
***HOWEVER***, I'm not 100% sure that having splicing macros returning
lists of length longer than one can be ruled out - maybe there was a
long-lost "feature" that made "(FOO . #)"  somewhat equivalent to
"(FOO #)" in that case.  Lose, lose.  Anyway, I've edited in these
changes to the reader.