(Limitations of Usual Tools): "expr '' \| ''"

outputs 0 on GNU/Linux these days.

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index c1664978e163c3c08fd34aef4cf25071a6b1a39a..4e01a029b4b2d8485087b5371784331b7664acc1 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -11701,7 +11701,7 @@ example:
 expr '' \| ''
 @end example
 
-@acronym{GNU}/Linux and Posix 1003.2-1992 return the empty string
+Posix 1003.2-1992 returns the empty string
 for this case, but traditional Unix returns @samp{0} (Solaris is
 one such example).  In Posix 1003.1-2001, the specification was
 changed to match traditional Unix's behavior (which is