bug#13064: 24.4.50; Recent changes to ert.el broke "make check" on trunk

[Chong Yidong]

`make check' fails on latest trunk due to this commit:

  revno: 110983
  committer: Stefan Monnier <monnier@iro.umontreal.ca>
  branch nick: trunk
  timestamp: Thu 2012-11-22 22:26:09 -0500
  message:
  * emacs-lisp/ert.el, emacs-lisp/ert-x.el: Use cl-lib and lexical-binding.

The error condition is:

1 unexpected results:
   FAILED  ert-test-record-backtrace

Test ert-test-record-backtrace condition:
    (ert-test-failed
     ((should
       (equal first-line "  signal(ert-test-failed (\"foo\"))"))
      :form
      (equal "  (closure (ert--test-body-was-run t) nil (ert-fail \"foo\"))()" 
"  signal(ert-test-failed (\"foo\"))")
      :value nil :explanation
      (arrays-of-different-length 61 33 "  (closure (ert--test-body-was-run t) 
nil (ert-fail \"foo\"))()" "  signal(ert-test-failed (\"foo\"))" 
first-mismatch-at 2)))


In GNU Emacs 24.3.50.7 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2012-12-02 on ulysses
Bzr revision: 111062 cyd@gnu.org-20121202062232-h7g8nwdfwszelw70
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
System Description:     Ubuntu 12.04.1 LTS

Configured using:
 `configure '--with-x-toolkit=gtk3' 'CFLAGS=-g''