Del the extra dot

Signed-off-by: YuPengZTE <yu.peng36@zte.com.cn>

docs/reference/commandline/run.md

@@ -76,7 +76,7 @@ Options:
   -m, --memory string               Memory limit
       --memory-reservation string   Memory soft limit
       --memory-swap string          Swap limit equal to memory plus swap: '-1' to enable unlimited swap
-      --memory-swappiness int       Tune container memory swappiness (0 to 100) (default -1).
+      --memory-swappiness int       Tune container memory swappiness (0 to 100) (default -1)
       --name string                 Assign a name to the container
       --network-alias value         Add network-scoped alias for the container (default [])
       --network string              Connect a container to a network