Autoconf fails test 4 with m4-1.4.7a

[Ralf Wildenhues]

With current Autoconf HEAD (and 2.60, FWIW), and M4 branch-1_4,
I get a failure of Autoconf's test 4 on my GNU/Linux system.

Cheers,
Ralf

#                             -*- compilation -*-
4. tools.at:126: testing ...
../../autoconf/tests/tools.at:169: autoconf --force -t TRACE1 -t TRACE2
--- -   2006-10-24 15:24:18.857589000 +0200
+++ /tmp/autoconf/build/tests/testsuite.dir/at-stdout   2006-10-24 
15:24:18.000000000 +0200
@@ -13,6 +13,6 @@
 configure.ac:13:TRACE2:active
 configure.ac:13:TRACE1:foo:active::ACTIVE
 configure.ac:13:TRACE2:active::ACTIVE
-configure.ac:19:TRACE1:foo bar:bar foo
+configure.ac:16:TRACE1:foo bar:bar foo
 configure.ac:19:TRACE2:bar foo
 
4. tools.at:126: 4. autoconf --trace: user macros (tools.at:126): FAILED 
(tools.at:169)