[FYI] {maint} tests: fix spurious failure of txinfo21.test on FreeBSD

[Stefano Lattarini]

* tests/txinfo21.test: Use the `is_newest' subroutine instead of
the `ls -t' hack to to determine whether a file has been updated.
This is required because at least FreeBSD `ls' do not sort files
with the same timestamp in alphabetical order when using the `-t'
option.
---
 ChangeLog           |    9 +++++++++
 tests/txinfo21.test |    4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 62c5493..b9c71f3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2011-05-07  Stefano Lattarini  <address@hidden>
+
+       tests: fix spurious failure of txinfo21.test on FreeBSD
+       * tests/txinfo21.test: Use the `is_newest' subroutine instead of
+       the `ls -t' hack to to determine whether a file has been updated.
+       This is required because at least FreeBSD `ls' do not sort files
+       with the same timestamp in alphabetical order when using the `-t'
+       option.
+
 2011-05-04  Stefano Lattarini  <address@hidden>
 
        tests defs: allow requirements for compilers (mostly dummy)
diff --git a/tests/txinfo21.test b/tests/txinfo21.test
index 4bbce4a..5644c0b 100755
--- a/tests/txinfo21.test
+++ b/tests/txinfo21.test
@@ -95,11 +95,11 @@ test -d sub/main2.html
 test -d rec/main3.html
 
 # Rebuilding main.html should cause its timestamp to be updated.
-test `ls -1td main.texi main.html | sed 1q` = main.html
+is_newest main.html main.texi
 $sleep
 touch main.texi
 $MAKE html
-test `ls -1td main.texi main.html | sed 1q` = main.html
+is_newest main.html main.texi
 
 $MAKE clean
 test ! -d main.html
-- 
1.7.3.5