Minor code style fixes for apidoc
Fixes #2659
Fixes #2655: Arrayable and ArrayableTrait are incompatible for some PHP versions.
Update console-migrate.md

Corrected 'class' parameter
Fixed test break.
Merge pull request #2660 from EmilHaukeland/patch-2

Corrected 'class' parameter
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Merge branch 'master' of https://github.com/yiisoft/yii2 into advanced-app-travis