def diff_lint_report(diff_lint_dict: dict) ->str:
    """Generate report in same format as pylint, but for diff only

    :param diff_lint_dict: dict as produced by :func:`~diff_cov_lint.lint.filter_lint`
    :type diff_lint_dict: dict
    :return: output with errors in diff only
    :rtype: str
    """
    ans = '=' * 26 + ' DIFF LINT ' + '=' * 26 + '\n'
    for filename in diff_lint_dict:
        for line in diff_lint_dict[filename]:
            ans += f"""{filename}:{line}:0 {diff_lint_dict[filename][line]['error']}: {diff_lint_dict[filename][line]['msg']}
"""
    return ans
