Expression body syntax is preferable here

Reports return expressions (one-liners or when) that can be replaced with expression body syntax.

Expression body syntax is recommended by the style guide.

Convert to expression body quick-fix can be used to amend the code automatically.

Example:

fun sign(x: Int): Int {
    return when { // <== can be simplified
        x < 0 -> -1
        x > 0 -> 1
        else -> 0
    }
}

After the quick-fix is applied:

fun sign(x: Int): Int = when {
    x < 0 -> -1
    x > 0 -> 1
    else -> 0
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Kotlin, @snapshot@

Last modified: 13 July 2023