trailing whitespace

Author: coke

doc/Type/Supplier/Preserving.pod6

@@ -15,7 +15,7 @@ Starting a preserving C<Supply> and consuming its values after it is C<done>:
 
     my $p = Supplier::Preserving.new;
     start for ^3 {
-        $p.emit($_); 
+        $p.emit($_);
         LAST {
             say „done after { now - BEGIN now}s“;
             $p.done;