Tidy tests related to RexOps#1508 (to satisfy xt/author/perltidy.t)

`dzil test -all` was failing on `xt/author/perltidy.t`, apparently
not happy with the indentation/tab-stops.

CHANGES:
=============
modified: t/issue/1508.t

HOW TO TEST :
=============
```shell
$ prove --lib -v t/issue/1508.t   # for this issue
$ prove --lib --recursive  t/     # for non-regression
```

Author: tabulon

t/issue/1508.t

@@ -144,8 +144,6 @@ task test6 => sub {
   T::check_needed( $_, { argv => \@_ } ) for (qw/test /);
 };
 
-
-
 {
   my $task_list = Rex::TaskList->create;
   my $run_list  = Rex::RunList->instance;