Bug [V4] PactDslJsonRootValue as request body fails

[huehnerlady]

My issue sounds a bit similar to #883, but this time it is with Pactversion V4.

I have the following pact test

@ExtendWith(value = [PactConsumerTestExt::class])
@Tag("pact")
@PactTestFor(providerName = "Provider")
class WebidStatusPactConsumerTest {

  @Pact(consumer = "Consumer")
  fun test(builder: PactBuilder) =
      builder
          .expectsToReceiveHttpInteraction("test") { httpBuilder ->
            httpBuilder
                .withRequest { httpRequestBuilder ->
                  httpRequestBuilder
                      .path("/test")
                      .method("POST")
                      .headers(mapOf("Content-Type" to "text/plain"))
                      .body(PactDslJsonRootValue.stringType("exampleString"))
                }
                .willRespondWith { httpResponseBuilder ->
                  httpResponseBuilder
                      .status(200)
                }
          }
          .toPact()

  @Test
  @PactTestFor(pactMethod = "test", pactVersion = V4)
  fun test(mockServer: MockServer) {
    shouldNotThrowAny {
      RestTemplate().postForObject<Void>(mockServer.getUrl() + "/test", "exampleString")
    }
  }
}

When this runs, I get the pact error

au.com.dius.pact.consumer.PactMismatchesException: The following mismatched requests occurred:
body - /: Expected body '"exampleString"' to match 'exampleString' using equality but did not match

when I change my request to be "\"exampleString\"" it works (I run into the next issue in my pact, but this is out of scope here)

So it seems there is an additional " expected for some reason?