Line Seperator issue between windows and unix

Tái hiện sự khác biệt bằng cách sử dụng google-java-format-1.10.0-all-deps.jar và ví dụ MinimalExample.java với cả kết thúc dòng LF và CRLF. Truy tìm lý do formatter tạo ra cách xuống dòng khác nhau, sau đó xác minh rằng việc định dạng cùng một mã nguồn cho đầu ra nhất quán, không có thêm một lần xuống dòng, trên cả hai nền tảng.

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)