mount.zfs.8: lint

Signed-off-by: Ahelenia Ziemiańska <[email protected]>

Author: nabijaczleweli

man/man8/mount.zfs.8

@@ -44,7 +44,7 @@ to mount filesystem snapshots and
 ZFS filesystems, as well as by
 .Xr zfs 8
 when the
-.Ev Em $ZFS_MOUNT_HELPER
+.Em $ZFS_MOUNT_HELPER
 environment variable is not set.
 Users should should invoke either
 .Xr mount 8