Move the test for ok(1, "") into the TAP formatter tests.

For #84

t/Builder/output.t

@@ -77,24 +77,22 @@ END { 1 while unlink($tmpfile) }
     my $out = $tb->output(\$fakeout);
     $tb->exported_to(__PACKAGE__);
     $tb->no_ending(1);
-    $tb->plan(tests => 6);
+    $tb->plan(tests => 5);
 
     $tb->ok(1, "ok");
     $tb->ok(1, "ok\n");
     $tb->ok(1, "ok, like\nok");
     $tb->skip("wibble\nmoof");
     $tb->todo_skip("todo\nskip\n");
-    $tb->ok(1, "");
 
     is( $fakeout, <<'OUTPUT' );
 TAP version 13
-1..6
+1..5
 ok 1 - ok
 ok 2 - ok\n
 ok 3 - ok, like\nok
 ok 4 # SKIP wibble\nmoof
 not ok 5 # TODO SKIP todo\nskip\n
-ok 6 - 
 OUTPUT
 }
 

t/Formatter/TAP/basic.t

@@ -301,4 +301,15 @@ OUT
 }
 
 
+note "Name with an empty string (github #84)"; {
+    my $result = Test::Builder2::Result->new_result(
+        pass            => 1,
+        test_number     => 99,
+        name            => ''
+    );
+
+    $ec->post_event($result);
+    is(last_output, "ok 99 - \n", "empty string name preserved");
+}
+
 done_testing();