[S05] be a bit more precise in :nth wording

Author: moritz

S05-regex.pod

@@ -508,8 +508,8 @@ which is the same as:
      m/(\d+)/ && m:c/(\d+)/ && s:c/(\d+)/@data[$0]/;
 
 The argument to C<:nth> is allowed to be a list of integers, but such a list
-should be monotonically increasing.  (Values which are less than or equal to the previous
-value will be ignored.)  So:
+should be monotonically increasing.  (Values which are less than or equal to
+any previous value will be ignored.)  So:
 
 
     :nth(2,4,6...*)    # return only even matches