I was looking through the perldoc for Test::Class and came across something I hadn't seen before...

  package Example::Test;
  use base qw(Test::Class);
  use Test::More;

  sub subtraction : Test {
      is( 2-1, 1, 'subtraction works );
  };
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What is that strange colon doing between subtraction and Test - and what is it up to?

Can someone tell me what it is called and which Perl man page documents it?

-Andrew.