You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: spm_authors.m
    path of file: ./repos/spm12
    
    the code of the file until where you have to start completion: function [current, previous] = spm_authors
% Return list of SPM coauthors
% FORMAT [current, previous] = spm_authors
% current  - cell array of SPM coauthors of the current release
% previous - cell array of SPM coauthors of previous releases
%__________________________________________________________________________
% Copyright (C) 2010-2012 Wellcome Trust Centre for Neuroimaging

% SPM

    
function [current, previous] = spm_authors
% Return list of SPM coauthors
% FORMAT [current, previous] = spm_authors
% current  - cell array of SPM coauthors of the current release
% previous - cell array of SPM coauthors of previous releases
%__________________________________________________________________________
% Copyright (C) 2010-2012 Wellcome Trust Centre for Neuroimaging

% SPM
% $Id: spm_authors.m 5039 2012-11-06 20:39:58Z guillaume $


fid = fopen(fullfile(spm('Dir'),'AUTHORS.txt'),'rt');
if fid==-1, current = {}; previous = {}; return; end