[master] minor grammar change

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 170cb6d430d4489936a833b0b870e61e718a9f4c..5b3cc3ecda2d1ec7762c68f399b91b51b1c8937c 100644 (file)
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -6383,7 +6383,7 @@ options {
                <para>
                  If set, this is a shared secret used for generating
                  and verifying Source Identity Token EDNS options
-                 within a anycast cluster.  If not set the system
+                 within an anycast cluster.  If not set, the system
                  will generate a random secret at startup.  The
                  shared secret is encoded as a hex string and needs
                  to be 128 bits for AES128, 160 bits for SHA1 and