All migration guides in Docs:

Done

• "In PhpGenerator methods setDocuments(), getDocuments() and addDocument() was replaced by setComment(), getComment() and addComment()" - Closed by [Rector] allow AbstractChangeMethodNameRector work with multiple objects and methods #12

• "Negative validation rules. An alternative for the ~Form::FILLED is Form::BLANK, or ~Form::EQUAL can be replaced with Form::NOT_EQUAL"

• "Nette\Utils\Html::add() is replaced with addHtml() and addText()" - Closed by [Nette] prepare type call for Html #8

Sources

• https://forum.nette.org/cs/26250-pojdte-otestovat-nette-2-4-rc
• https://doc.nette.org/en/2.4/migration-2-1#toc-dependency-injection-di-2
• https://github.com/nette/nette/releases/tag/v2.4.0
• https://doc.nette.org/en/2.4/migration
• https://doc.nette.org/en/2.4/migration-2-4#toc-others