perl -MURI::Escape -E '

my $str = "www.abc%20.com";
say $str;

$str = URI::Escape::uri_unescape( $str );
say $str;

$str =~ s/\s//g;
say $str;
'

##</code><code>##

www.abc%20.com
www.abc .com
www.abc.com