This task   (the reverse of   URL encoding   and distinct from   URL parser)   is to provide a function
or mechanism to convert an URL-encoded string into its original unencoded form.



Test cases

   The encoded string   "http%3A%2F%2Ffoo%20bar%2F"   should be reverted to the unencoded form   "http://foo bar/".
   The encoded string   "google.com/search?q=%60Abdu%27l-Bah%C3%A1"   should revert to the unencoded form   "google.com/search?q=`Abdu'l-Bahá".


$ include "seed7_05.s7i";
  include "encoding.s7i";
 
const proc: main is func
  begin
    writeln(fromPercentEncoded("http%3A%2F%2Ffoo%20bar%2F"));
    writeln(fromUrlEncoded("http%3A%2F%2Ffoo+bar%2F"));
  end func;