Line Seperator issue between windows and unix

Reproduziere die Abweichung mit google-java-format-1.10.0-all-deps.jar und dem Beispiel MinimalExample.java mit sowohl LF- als auch CRLF-Zeilenenden. Verfolge, warum der Formatter unterschiedliche Umbrüche erzeugt, und überprüfe anschließend, dass das Formatieren derselben Quelle auf beiden Plattformen eine konsistente Ausgabe ohne zusätzlichen Zeilenumbruch liefert.

When applying GJF, some code is formatted differently between Unix-style line seperators (LF) and Windows-style line seperators (CRLF). With windows-style an extra linebreak is added, caused by the char difference between LF (\n) and CRLF (\r\n).

I changed the line-separator-style with Intellij (File>File Properties> Line Separators, while having the file opened) and got the following outputs:

Executing java -jar google-java-format-1.10.0-all-deps.jar MinimalExample.java when the file is formatted with Unix line endings:

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import feign.FeignException;

public class MinimalExample {
  void googleJavaFormatWindowsFail() {

    FeignException feignException = mock(FeignException.class);
    when(feignException.contentUTF8()).thenReturn("""
    {
      "errorCode" : 420
    }
    """);
  }
}

Executing java -jar google-java-format-1.10.0-all-deps.jar MinimalExample.java when the file is formatted with Windows line endings:

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import feign.FeignException;

public class MinimalExample {
  void googleJavaFormatWindowsFail() {

    FeignException feignException = mock(FeignException.class);
    when(feignException.contentUTF8())
        .thenReturn("""
    {
      "errorCode" : 420
    }
    """);
  }
}

If two chars are added, Unix-style generates the same line-break:

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import feign.FeignException;

public class MinimalExample {
  void googleJavaFormatWindowsFail() {

    FeignException feignException = mock(FeignException.class);
    when(feignException.contentUTF8())
        .thenReturn("""
    {
      "errorCode" : 42069
    }
    """);
  }
}

Done on GJF 1.10.0, 1,9 and 1.8 with Java 15.0.2
Windows 10 10.0
IntelliJ IDEA 2021.1.1 (Community Edition)