IntelliJ Plugin with AOSP inserts incorrect blank lines during optimize imports

在 IntelliJ 插件中对报告中所示的 AOSP 风格 Java imports 运行 Optimize Imports，以重现该问题，然后将结果与 Spotless 和 Google Java Style Guide 进行比较。跟踪插件的 AOSP import 排序行为；当 Optimize Imports 只留下预期的空行且默认的 GOOGLE 样式不受影响时，即表示完成。

When using the IntelliJ google-java-formatter 1.16.0.2 with the AOSP style, the "Optimize Imports" action results in empty lines between imports with different TLDs.

Given:

// ...
import static org.assertj.core.api.Assertions.assertThat;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.params.ParameterizedTest;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
// ...

Results in:

// ...
import static org.assertj.core.api.Assertions.assertThat;

import lombok.extern.slf4j.Slf4j;

import org.junit.jupiter.params.ParameterizedTest;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
// ...

Expected:

When using spotless:check with google-java-formatter 0.16.0 / 0.17.0 and AOSP, it complains that all but the first empty line have to be removed. The online documentation seems to agree with spotless.

The IntelliJ plugin does not break the Google Java Style Guide when executing "optimize imports".

Context

This being inconsistent between spotless and Intellij is very inconvenient. We use use spotless in the CI to enforce the codestyle and this necessitates running mvn spotless:apply for every commit or disabling "optimize imports" which itself results in manual cleanup of unused imports.

I have tried it with the default GOOGLE style and that does not seem to have this problem.