Iurii Ignatko

[BUG][native][apache-httpclient] Generated code contains warnings in ApiClient

1

#### Bug Report Checklist - [x] Have you provided a full/minimal spec to reproduce the issue? - [x] Have you validated the input using an OpenAPI validator ([example](https://apidevtools.org/swagger-parser/online/))? - [x]...

This PR adds a line separator, which moves the exception to a new line instead of having it be concatenated. Before the change, an example error would've been logged like...