SecurityMockMvcResultMatchers - Kotlin examples don't trigger assertions

Describe the bug

https://github.com/spring-projects/spring-security/blob/5.7.3/docs/modules/ROOT/pages/servlet/test/mockmvc/result-matchers.adoc#authenticated-assertion

The Kotlin examples for the MockMvc assertions call the Java functions, but these methods are not compatible with the Kotlin DSL, and so this test will always pass:

fun `user should be authenticated`() {
  mvc
      .perform(formLogin())
      .andExpect { authenticated() }
      .andExpect { unauthenticated() }
      .andExpect { authenticated().withRoles("USER", "ADMIN") }
      .andExpect { authenticated().withRoles("blah", "qwerty") }
}

authenticated() returns a AuthenticatedMatcher instance, but the returned value isn't used for anything.

Expected behavior

The examples for Kotlin SecurityMockMvcResultMatchers are corrected.

Sample

mvc-kt-matchers.zip