(expr invocation): expr exit status is 3 only for

internal errors now; 2 is also for invalid values in expressions.

doc/ChangeLog

@@ -1,3 +1,8 @@
+2006-04-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* coreutils.texi (expr invocation): expr exit status is 3 only for
+	internal errors now; 2 is also for invalid values in expressions.
+
 2006-04-09  Ori Avtalion  <oavtal@bezeqint.net>
 
 	* coreutils.texi (Top): Add 'hostid' to System context menu line.

doc/coreutils.texi

@@ -10277,8 +10277,8 @@ Exit status:
 @display
 0 if the expression is neither null nor 0,
 1 if the expression is null or 0,
-2 if the expression is syntactically invalid,
-3 if an error occurred.
+2 if the expression is invalid,
+3 if an internal error occurred (e.g., arithmetic overflow).
 @end display
 
 @menu