Fix typo: word was repeated

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 443cef452f0ccd44e690d583c954726125de2303..0af06cea119b200dce7d3cf1730397df6d9a0b0e 100644 (file)
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -8948,7 +8948,7 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
                  answer available.
                </para>
                <para>
-                 The <option>prefetch</option> specifies the the
+                 The <option>prefetch</option> specifies the
                  "trigger" TTL value at which prefetch of the current
                  query will take place: when a cache record with a
                  lower TTL value is encountered during query processing,