I have a file started with bibtex item, e.g.,

1 @Article{XXXXXX,
2 author = {XXXXXXXX},
3 .........
4 }

when I use 3.1 to save the database, one line break between encoding comment and items is missing, e.g.,

1 % Encoding: UTF-8@ARTICLE{XXXXXX,
2 author = {XXXXXXXX},
3 .........
4 }

please fix it.