doc: typo fix in rados/operations/crush-map

Signed-off-by: Drunkard Zhang <gongfan193@gmail.com>

diff --git a/doc/rados/operations/crush-map.rst b/doc/rados/operations/crush-map.rst
index d6ef95faa4667eebd78dc04f707dbd3c9035a881..e28627b113e8e94d473bf133967e3c7068a50df8 100644 (file)
--- a/doc/rados/operations/crush-map.rst
+++ b/doc/rados/operations/crush-map.rst
@@ -488,7 +488,7 @@ default pools.
    you create a new pool, its default ruleset is ``0``.
 
 
-CRUSH rules defines placement and replication strategies or distribution policies
+CRUSH rules define placement and replication strategies or distribution policies
 that allow you to specify exactly how CRUSH places object replicas. For
 example, you might create a rule selecting a pair of targets for 2-way
 mirroring, another rule for selecting three targets in two different data