[Kotlin-Client] Malfunctioning parameter generation in Kotlin with -last or hasMore

Description

I do have a problem with kotlin-client code generation (or kotlin in 2.4) in the current master as well as 3.0.3 and 2.4 versions of Swagger Codegen.

Running java -jar swagger-codegen-cli-3.0.3.jar generate -l kotlin-client -i https://esi.evetech.net/latest/swagger.json\?datasource\=tranquility yields many problems of the same type as the following example:

fun postCharactersCharacterIdAssetsLocations(body: kotlin.Array<kotlin.Long>characterId: kotlin.Int, datasource: kotlin.String, token: kotlin.String) : kotlin.Array<kotlin.Any> {
    // ...
}

On a closer look one can see that a comma is missing between the first argument and the following arguments. This yields a compiler error, of course.

Swagger-codegen version

Tried with different versions (master included). As stated above.

Swagger declaration file content or url

https://esi.evetech.net/latest/swagger.json?datasource=tranquility

Command line used for generation

java -jar swagger-codegen-cli-3.0.3.jar generate -l kotlin-client -i https://esi.evetech.net/latest/swagger.json\?datasource\=tranquility
on Arch Linux with the following Java runtime:

$ java -version
openjdk version "1.8.0_192"
OpenJDK Runtime Environment (build 1.8.0_192-b26)
OpenJDK 64-Bit Server VM (build 25.192-b26, mixed mode)

Steps to reproduce

Generate the files with the above Swagger config.

Related issues/PRs

Suggest a fix/enhancement

https://github.com/theZorro266/swagger-codegen/commit/73447d10e9d38cf0cadd6bc8c5385b08f67ef7e3

Honestly, hasMore seems to be buggy at the moment. It is false with the first parameter in allParams although there actually are more parameters. Fixing that would solve this one issue, but there is still something wrong with -last directive and the handlebars templating engine. This needs a closer look.

Reproduce the Kotlin client with the provided Swagger URL and generation command, then inspect parameter generation around allParams, hasMore, the -last directive, and the Handlebars templating behavior. Done means the generated function parameters include the required commas and compile without errors.