Merge branch 'docs' into 'master'

Fix title and description of delmembers command.

See merge request !663
11 jobs for master in 18 minutes and 29 seconds (queued for 4 minutes and 8 seconds)
Status Job ID Name Coverage
  Test
passed #594170685
docs

00:02:52

passed #594170831
mysql
mysql-35

00:10:58

passed #594170865
mysql
mysql-37

00:09:30

passed #594170761
postgres
pgsql-35

00:07:30

passed #594170789
postgres
pgsql-37

00:07:51

passed #594170673
qa

00:02:40

passed #594170691
sqlite-35

00:07:02

passed #594170707
sqlite-36

00:06:22

passed #594170718
sqlite-37

00:06:49

passed #594170734
sqlite-38

00:06:11

passed #594170746
sqlite-39

00:06:41