[Pharo 8.0] Build #534: Change some isNil ifTrue: and variants to use ifNil: and friends.

There is a new Pharo build available!
 
The status of the build #534 was: FAILURE.

The Pull Request #4018 was integrated: "Change some isNil ifTrue: and variants to use ifNil: and friends."
Pull request url: https://github.com/pharo-project/pharo/pull/4018

Issue Url: https://github.com/pharo-project/pharo/issues/ifNilUsageImprovements
Build Url: https://ci.inria.fr/pharo-ci-jenkins2/job/Test%20pending%20pull%20request%20and%20branch%20Pipeline/job/Pharo8.0/534/