Fix tests with new nu/de behaviour

S32-num/rat.t

@@ -38,11 +38,11 @@ is(Rat.new(39, 33).nude, (13, 11), "Reduce to simplest form in constructor");
 is(Rat.new(0, 33).nude, (0, 1), "Reduce to simplest form in constructor");
 is(Rat.new(1451234131, 60).nude, (1451234131, 60), "Reduce huge number to simplest form in constructor");
 #?niecza skip 'Unable to resolve method nude in class Num'
-is(Rat.new(1141234123, 0).nude, (1, 0), "Huge over zero becomes one over zero");
+is(Rat.new(1141234123, 0).nude, (1141234123, 0), "Huge over zero stays huge over zero");
 #?niecza skip 'Unable to resolve method nude in class Num'
-is(Rat.new(-7, 0).nude, (-1, 0), "Negative over zero becomes negative one over zero");
+is(Rat.new(-7, 0).nude, (-7, 0), "Negative seven over zero stays negative seven over zero");
 #?niecza todo
-dies-ok( { Rat.new(0, 0) }, "Zero over zero is not a legal Rat");
+is(Rat.new(0, 0).nude, (0,0), "Zero over zero stays zero over zero");
 
 # Test basic math
 is(1 / 4 + 1 / 4, 1/2, "1/4 + 1/4 = 1/2");