[master] fix typo and add formatting for it while here.

src/bin/stats/b10-stats.xml

@@ -89,7 +89,8 @@
     <para><filename>/usr/local/share/bind10-devel/stats.spec</filename>
       &mdash; This is a spec file for <command>b10-stats</command>. It
       contains definitions of statistics items of BIND 10 and commands
-      received vi bindctl.
+      received via
+      <refentrytitle>bindctl</refentrytitle><manvolnum>1</manvolnum>.
     </para>
   </refsect1>