Default argument equals removed when at line start

[rnett]

When running with autoformat, the equals sign for a default argument is removed if it is at the line start (it's because of codegen).

Reproducer

With 0.40.0, Kotlin 1.4.21,

public fun decodeRaw2(littleEndian: Boolean?
= null): Int = 3

is turned into this:

public fun decodeRaw2(
    littleEndian: Boolean?
    null
): Int = 3

which doesn't compile.