Define Rat.Str to not go through Num
Define Rat.Str to not go through Num

Precision is now guaranteed for the integer part, while the
precision of the fractional part is limited to the size of the
remaining denominator (after subtracting the integer part) plus 1.
(The fraction can turn out shorter if the representation is exact.)

perl6/specs,prammer/specs,prammer/specs,prammer/specs,tokuhirom/specs,tokuhirom/specs,perl6/specs,tokuhirom/specs