Changes to testsuite(3)

Changes to testsuite:
commit ff6113ef98e778f3b5ae25d542e0fe6f12c6aed1
Author: Simon Peyton Jones <simonpj@microsoft.com>
Date:   Fri Jan 10 08:48:53 2014 +0000

    Adjust "max_bytes_used" upward for T4801

commit 5e8e8e6e62c5826133c053cd78bb35e9b4aaa05b
Author: Simon Peyton Jones <simonpj@microsoft.com>
Date:   Thu Jan 9 17:59:51 2014 +0000

    Changes in error messages when fixing Trac #8649

    Mostly improvements, happily

commit 1285af76c32c84332835d5d430146403bf610796
Author: Simon Peyton Jones <simonpj@microsoft.com>
Date:   Tue Jan 7 12:21:28 2014 +0000

    Test Trac #5498