Slight rephrasing

Author: JJ

doc/Language/routines.pod6

@@ -80,10 +80,9 @@ Defined as:
     multi sub undefine(Array \x)
     multi sub undefine(Hash  \x)
 
-B<DEPRECATED> in 6.d language version and will be removed in 6.e. For
-L<Array> and L<Hash>, equivallent to assigning L<Empty>; for everything else,
-equivalent to assigning L<Nil>. This routine is deprecated and you should use
-L<Empty>/L<Nil> directly, instead.
+B<DEPRECATED> in 6.d language version and will be removed in 6.e. For L<Array>
+and L<Hash>, it will become equivalent to assigning L<Empty>; for everything
+else, equivalent to assigning L<Nil>, whose use is advised.
 
 =end pod