assertThat(response1.header("Alpha")).isEqualTo("α")
    assertThat(response1.header("β")).isEqualTo("Beta")
    assertThat(response1.body.string()).isEqualTo("abcd")
    val response2 = get(server.url("/"))
    assertThat(response2.header("Alpha")).isEqualTo("α")
    assertThat(response2.header("β")).isEqualTo("Beta")
    assertThat(response2.header("Gamma")).isEqualTo("Γ")

    // Make a range request.
    val request =
      Request.Builder()
        .url(server.url("/"))
        .header("Range", "bytes=0-")
        .build()
    val call = client.newCall(request)

    // The response is not decompressed.
    val response = call.execute()
    assertThat(response.header("Content-Encoding")).isEqualTo("gzip")
    assertThat(response.body.source().readByteString()).isEqualTo(

- Client-go: Optimized leaders renewing leases by updating leader lock optimistically without getting the record from the API server first. Also, a new metric `leader_election_slowpath_total` was added to allow users to monitor how many leader elections are updated non-optimistically.