Generated examples are not valid when using regular expression patterns

Generated examples are not valid when using regular expression patterns.
In this case, the example is simply "string" without honoring the regular expression.

Steps to replicate:

OA as an example:

openapi: 3.0.3
info:
  version: 1.0.0
  title: Test
  description: Test
servers:
  - url: "/api/1"
paths:
  /test:
    get:
      operationId: Test
      summary: Test
      description: Test
      responses:
        "200":
          description: Test
          content:
            application/json:
              schema:
                type: object
                properties:
                  test:
                    type: string
                    pattern: "^[0-9]{5,8}$"

Observe the example rendered as {"test": "string"} that is not valid against the schema.

Original issue: Redocly/redoc#2312

Added to RapiDoc just now: https://github.com/rapi-doc/RapiDoc/pull/947/files#diff-82d61daee06cfa4e64b7d6351db4581c12a0b04c8d7f6f5960f970b8d0835c95R268-R274

Should be doable in ReDoc too, just need to pass in the schema.pattern here:

openapi-sampler/src/samplers/string.js

Line 130 in d143da1

return sampler(schema.minLength | 0, schema.maxLength, propertyName);

Will post PR shortly.

OK, just proposed a solution in #153. BTW if ignoring minLength / maxLength constraints is acceptable then there is a one-liner solution.