Document URL: 
https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.4/html-single/administration_guide/index#Promoting_a_Slave_to_Master

Section Number and Name: 
IV. Manage
- Chapter 10. Managing Geo-replication
-- 10.7. Disaster Recovery
--- 10.7.1. Failover: Promoting a Slave to Master

Describe the issue: 
In the second point the command seem to be misaligned:

2. Run the following commands on the slave machine to promote it to be the master:

# gluster volume set VOLNAME geo-replication.indexing on
 # gluster volume set VOLNAME changelog on

For example

# gluster volume set slave-vol geo-replication.indexing on
 volume set: success
 # gluster volume set slave-vol changelog on
 volume set: success

Suggestions for improvement: 
Remove the extra space and align the commands as shown below.

2. Run the following commands on the slave machine to promote it to be the master:

# gluster volume set VOLNAME geo-replication.indexing on
# gluster volume set VOLNAME changelog on

For example

# gluster volume set slave-vol geo-replication.indexing on
 volume set: success
# gluster volume set slave-vol changelog on
 volume set: success


Additional information: