doc: use mktemp, not tempfile, in a shred usage example

* doc/coreutils.texi (shred invocation):
Use mktemp(1) instead of Debian-specific tempfile(1).

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 3e7a698..34ccf5a 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -8718,7 +8718,7 @@ The intended use of this is to shred a removed temporary file.
 For example:
 
 @example
-i=`tempfile -m 0600`
+i=`mktemp`
 exec 3<>"$i"
 rm -- "$i"
 echo "Hello, world" >&3