JavaNetCookieJar: "value is not trimmed" crash for Cookie header token="abc123 "

[vansh1sh]

Problem
When using JavaNetCookieJar with a CookieHandler/CookieManager that returns a Cookie header containing a quoted value with trailing space, OkHttp throws:

java.lang.IllegalArgumentException: value is not trimmed
    at okhttp3.Cookie$Builder.value(Cookie.kt:...)
    at okhttp3.java.net.cookiejar.JavaNetCookieJar.decodeHeaderAsJavaNetCookies(JavaNetCookieJar.kt:...)
    ...

Example problematic header:

Cookie: token="abc123 "
After unquoting, this becomes abc123 (with a trailing space). Cookie.Builder.value enforces value.trim() == value, so decodeHeaderAsJavaNetCookies currently crashes instead of tolerating the benign whitespace.

Minimal failing test

This test goes into okhttp/src/jvmTest/kotlin/okhttp3/CookiesTest.kt and fails without the fix:

@Test
fun cookieHandlerWithQuotedValueAndTrailingSpace() {
  server.enqueue(MockResponse())
  val serverUrl = urlWithIpAddress(server, "/")
  val androidCookieHandler: CookieHandler =
    object : CookieHandler() {
      override fun get(
        uri: URI,
        map: Map<String, List<String>>,
      ) = mapOf(
        "Cookie" to
          listOf(
            "token=\"abc123 \"",
          ),
      )

      override fun put(
        uri: URI,
        map: Map<String, List<String>>,
      ) {
      }
    }
  client =
    client
      .newBuilder()
      .cookieJar(JavaNetCookieJar(androidCookieHandler))
      .build()
  get(serverUrl)
  val request = server.takeRequest()
  assertThat(request.headers["Cookie"]).isEqualTo("token=abc123")
  assertThat(request.headers["Quux"]).isNull()
}