Tweak for maintainability.

[pspp] / ChangeLog

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+2009-07-20  Bruno Haible  <bruno@clisp.org>
+
+       * tests/test-pipe.c (BACKUP_STDERR_FILENO): New macro.
+       (main): Use it.
+
+2009-07-20  Eric Blake  <ebb9@byu.net>
+
+       test-pipe: make a bit more robust.
+       * tests/test-pipe.c (myerr): Allow error messages regardless of
+       what we do to stderr.
+       (test_pipe): Rearrange to avoid deadlock.
+       (child_main): Try a larger read, to ensure we avoided deadlock.
+       * lib/pipe.c (create_pipe) [_WIN32]: Fix comment.
+       * lib/pipe.h (create_pipe_bidi): Document potential for deadlock
+       if misused.
+
 2009-07-19  Jim Meyering  <meyering@redhat.com>
 
        fts: avoid false-positive cycle-detection