Make .range consistently a Str

It's given as a Str in all the other instances in the setting and
defaults to Str "<unknown>"

src/core/Range.pm

@@ -708,7 +708,7 @@ my class Range is Cool does Iterable does Positional {
 
     method in-range($got, $what?) {
         self.ACCEPTS($got)
-          || X::OutOfRange.new(:what($what // 'Value'),:got($got.perl),:range(self)).throw
+          || X::OutOfRange.new(:what($what // 'Value'),:got($got.perl),:range(self.gist)).throw
     }
 
     multi method minmax(Range:D:) {