Correct wrong test that hid a Rakudo bug.

We're meant to chomp separators by default, but previously only did
chomp \r\n and \n. Now that's fixed in Rakudo, and this wrong test
came to light.

S32-io/io-handle.t

@@ -30,7 +30,7 @@ my $path = "io-handle-testfile";
     }
     my $RT123888 = $path.IO.open(:r);
     $RT123888.nl-in = "+";
-    is $RT123888.lines, <A+ B+ C+ D+>, "Changing input-line-separator works for .lines";
+    is $RT123888.lines, <A B C D>, "Changing input-line-separator works for .lines";
 }
 
 try { unlink $path }