Docs should wrap at line limit, not at "\n"

Proto:

enum Option {
  /**
  * This is the default option. Its documentation should wrap not at
  * the "\n" symbol but at the right place according to the line limit.
  */
  DEFAULT = 1;
}

generates:

enum class Option(
  override val value: Int
) : WireEnum {
  /**
   * This is the default option. Its documentation should wrap not at
   * the "\n" symbol but at the right place according to the line limit.
   */
  DEFAULT(1);
...

should be:

enum class Option(
  override val value: Int
) : WireEnum {
  /**
   * This is the default option. Its documentation should wrap not at the "\n" symbol but at the 
   * right place according to the line limit.
   */
  DEFAULT(1);
...

Start by reproducing the issue with the Proto enum and documentation shown in the report, then trace the generator path that produces Kotlin enum KDoc. The fix is complete when the generated comment wraps at the configured line limit rather than at the literal "\n" text.