Completes preamble to fix compilation errors

Fixes #2055

Author: JJ

doc/Language/testing.pod6

@@ -14,12 +14,12 @@ module provides a testing framework. Perl 6's official spectest suite uses C<Te
 
 The testing functions emit output conforming to the L<Test Anything Protocol|http://testanything.org>. In general, they are used in sink context:
 
-=for code :preamble<my $meta="Avoid compilation errors";>
+=for code :preamble<my ($meta,$relaxed-name); sub check-name($meta,:$relaxed-name){}>
 ok check-name($meta, :$relaxed-name), "name has a hyphen rather than '::'"
 
 but all functions also return as a Boolean if the test has been successful or not, which can be used to print a message if the test fails:
 
-=begin code :preamble<my $meta="Avoid compilation errors";>
+=begin code :preamble<my ($meta,$relaxed-name); sub check-name($meta,:$relaxed-name){}>
 ok check-name($meta, :$relaxed-name), "name has a hyphen rather than '::'" \
   or diag "\nTo use hyphen in name, pass :relaxed-name to meta-ok\n";
 =end code