[parrot/parrot] 082fa8: [test] speedup copyright year test

[GitHub]

  Branch: refs/heads/rurban/copyright-years-gh719
  Home:   https://github.com/parrot/parrot
  Commit: 082fa8fc70a420a72b52453d5eaa42c37c00af6c
      https://github.com/parrot/parrot/commit/082fa8fc70a420a72b52453d5eaa42c37c00af6c
  Author: Reini Urban <rurban at cpanel.net>
  Date:   2014-03-06 (Thu, 06 Mar 2014)

  Changed paths:
    M t/codingstd/copyright.t

  Log Message:
  -----------
  [test] speedup copyright year test

use only --format="%ai", use -n1 for the non-reverse case

The results are at https://github.com/parrot/parrot/issues/719
=> 1478 wrong copyright years