Update 04_Null Safety.md

Kotlin / kotlin-by-example

The sources of Kotlin by Example.

https://play.kotlinlang.org/byExample/overview

MIT License

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Closed chrismontone closed 5 years ago

chrismontone commented 5 years ago

notNull argument on line 26 is not defined. Switch it to a defined variable.

AlexanderPrendota commented 5 years ago

Thanks!