Newer Perl prints regex modifiers differently.

Index: t/tlib/AssertTest.pm
--- t/tlib/AssertTest.pm.orig
+++ t/tlib/AssertTest.pm
@@ -70,7 +70,7 @@ sub test_assert {
 
         'bang'  => [ __LINE__, sub { shift->assert(0, 'bang')              } ],
         'bang'  => [ __LINE__, sub { shift->assert('', 'bang')             } ],
-        "'qux' did not match /(?-xism:foo)/"
+        "'qux' did not match /(?^:foo)/"
                 => [ __LINE__, sub { shift->assert(qr/foo/, 'qux')         } ],
         'bang'  => [ __LINE__, sub { shift->assert(qr/foo/, 'qux', 'bang') } ],
         'a ne b'=> [ __LINE__, sub { shift->assert($coderef, 'a', 'b')     } ],
@@ -253,7 +253,7 @@ sub test_ok_not_equals {
         q{expected '', got 'foo'}           => [ 'foo',  ''      ], 
         q{expected 'foo', got ''}           => [ '',     'foo'   ], 
         q{expected 5, got 4}                => [ $adder, 5       ], 
-        q{'foo' did not match /(?-xism:x)/} => [ 'foo',  qr/x/   ], 
+        q{'foo' did not match /(?^:x)/}     => [ 'foo',  qr/x/   ], 
     );
     my @tests = ();
     while (@checks) {