Java (jaxrs-resteasy) codegen generate unicode character in java class for Enum type

Description

Enum type in openAPI definition, such as:

components:
  schemas:
    TestEnum:
      type: string
      nullable: true
      enum: 
       - ONE
       - TWO

The Java (jaxrs-resteasy) codegen generate the TestEnum.java class, contains unicode character (=), such as:

public enum TestEnum {
    {values=[ONE, TWO], enumVars=[{name=ONE, value="ONE"}, {name=TWO, value="TWO"}]}
}

Swagger-codegen version

Swagger declaration file content or url

Command line used for generation

Steps to reproduce

Related issues/PRs

Suggest a fix/enhancement

Start by reproducing the issue with the provided OpenAPI TestEnum definition through the jaxrs-resteasy generator, then trace the Java enum generation path that produces TestEnum.java. Done means the generated enum contains the ONE and TWO values without the shown encoded Unicode characters.