[Typescript] Enum name collision with `r` and `r+`

Description

Using typescript-node and typescript-fetch generators a duplicate entry is created when enum items have the same name with one containing a +.

Swagger-codegen version

5.4.0 downloaded using npm, @openapitools/openapi-generator-cli.

Swagger declaration file content or url

{
    "rating": {
       "type": "string",
       "enum": [
            "g",
            "pg",
            "pg_13",
            "r",
            "r+",
            "rx"
        ]
    },
}

this json schema (used inside an application/json response), gets converted to the following code:

export enum RatingEnum {
    G = <any> 'g',
    Pg = <any> 'pg',
    Pg13 = <any> 'pg_13',
    R = <any> 'r',
    R = <any> 'r+',
    Rx = <any> 'rx'
}

As you can see the entry R is present twice.

Command line used for generation

openapi-generator-cli generate -i swagger/swagger.json -o lib -g typescript-node --strict-spec false

Steps to reproduce

Create a swagger file with an endpoint that returns content with type application/json, it has to have a json schema attached with type object and the property above.

Use the command above to generate a typescript sdk for the swagger file.

Transpiling using tsc will throw an error.

Related issues/PRs

Unable to find any

Suggest a fix/enhancement

I would personally recommend transforming the + into the text plus so instead of R it would become RPlus or Rplus.
This problem may occur with other signs and generators as well, the ones described in this issue are the only ones I attempted.

Another option would be making it into the following type:

export type RatingEnum = 'g' | 'pg' | 'pg_13' | 'r' | 'r+' | 'rx';

If you have any questions please do ask them, I look on my GitHub multiple times a day and should be able to come back with a response fairly swiftly

Start by reproducing the issue with the provided schema and the typescript-node generator command, then compare the enum-name handling in the typescript-node and typescript-fetch generators. Check the generated RatingEnum with tsc; done means values such as r and r+ produce distinct valid TypeScript enum members without compilation errors.