Document pipeline grouping
If pipeline job names are formatted in certain ways, we will collapse them into a single group in pipeline graphs. The basic requirements is that there are two numbers, the first being the index and the second being the total.
According to https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6242, we support:
-
name 0 1
=>name
-
name 0:1
=>name
-
name 0/1
=>name
-
name 0:1 ruby
=>name ruby
-
name 0/1 ruby
=>name ruby
-
0 1 name ruby
=>name ruby
-
0:1 name ruby
=>name ruby
-
0/1 name ruby
=>name ruby