Update man page

Signed-off-by: George Amanakis <[email protected]>

man/man8/zpool.8

@@ -520,7 +520,7 @@ If a read error is encountered on a cache device, that read I/O is reissued to
 the original storage pool device, which might be part of a mirrored or raidz
 configuration.
 .Pp
-The content of the cache devices is can be made non-volatile, see the
+The content of the cache devices can be made non-volatile, see the
 .Sy l2cache_persistent
 zpool property.
 .Ss Pool checkpoint
@@ -912,7 +912,7 @@ See
 for additional details.  The default value is
 .Sy off .
 .It Sy l2cache_persistent Ns = Ns Sy on Ns | Ns Sy off
-Controls whether the L2ARC is rebuilt and thus made persistent across reboots.
+Controls whether the L2ARC is rebuilt at reboot and thus made persistent.
 When writing buffers to L2ARC, we periodically add some metadata to make sure
 we can pick them up after reboot to rebuilt the L2ARC, thus reducing the impact
 that any downtime has on the performance of storage systems with large caches.