The default option for GrowthExperiments' A/B testing system is named 'null' (as in "null hypothesis"), which is a poor choice as it can be mistaken to the special null value most programming languages have. This leads to all kinds of confusing situations, e.g. ge.utils.setUserVariant(null) and ge.utils.setUserVariant('null') do similar but not identical things.
Changing the name will be harder once the A/B test starts so let's change it before then, e.g. to 'control' (as in "control group").
Change 684798 had a related patch set uploaded (by Kosta Harlan; author: Kosta Harlan):
[mediawiki/extensions/GrowthExperiments@master] Rename variant control group to 'control'
Change 684799 had a related patch set uploaded (by Kosta Harlan; author: Kosta Harlan):
[operations/mediawiki-config@master] GrowthExperiments: Rename control variant to 'control'
Change 684829 had a related patch set uploaded (by Kosta Harlan; author: Kosta Harlan):
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.3] Rename variant control group to 'control'
Change 684830 had a related patch set uploaded (by Kosta Harlan; author: Kosta Harlan):
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.4] Rename variant control group to 'control'
Change 684798 merged by jenkins-bot:
[mediawiki/extensions/GrowthExperiments@master] Rename variant control group to 'control'
Change 684857 had a related patch set uploaded (by Kosta Harlan; author: Kosta Harlan):
[mediawiki/extensions/GrowthExperiments@master] Temporarily re-add 'null' control group
Change 684829 merged by jenkins-bot:
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.3] Rename variant control group to 'control'
Change 684832 had a related patch set uploaded (by Urbanecm; author: Kosta Harlan):
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.3] Temporarily re-add 'null' control group
Change 684830 merged by jenkins-bot:
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.4] Rename variant control group to 'control'
Change 684832 merged by jenkins-bot:
[mediawiki/extensions/GrowthExperiments@wmf/1.37.0-wmf.3] Temporarily re-add 'null' control group
Change 684799 merged by jenkins-bot:
[operations/mediawiki-config@master] GrowthExperiments: Rename control variant to 'control'
Change 684878 had a related patch set uploaded (by Urbanecm; author: Urbanecm):
[operations/mediawiki-config@master] GrowthExperiments: Set linkrecommendation variant to 0
Change 684878 merged by jenkins-bot:
[operations/mediawiki-config@master] GrowthExperiments: Set linkrecommendation variant to 0
Mentioned in SAL (#wikimedia-operations) [2021-05-04T12:20:49Z] <urbanecm@deploy1002> Synchronized php-1.37.0-wmf.3/extensions/GrowthExperiments/: 8f938c2: c8c07ab: GrowthExperiments backports (T281727) (duration: 00m 59s)
Mentioned in SAL (#wikimedia-operations) [2021-05-04T12:22:48Z] <urbanecm@deploy1002> Synchronized wmf-config/InitialiseSettings.php: 683b876: 5763630: GrowthExperiments: Rename control variant to control, GrowthExperiments: Set linkrecommendation variant to 0 (T281727) (duration: 00m 58s)
Change 684857 abandoned by Urbanecm:
[mediawiki/extensions/GrowthExperiments@master] Temporarily re-add 'null' control group
Reason:
this doesn't need to be merged in master (was only needed to let us change config safely), abandoning.