index.js
function analyseComment(file, comment){
    var reg = /(@require\.async\s+)('[^']+'|"[^"]+"|[^\s;!@#%^&*()]+)/g;
    return comment.replace(reg, function(m, prefix, value){
        addAsync(file, value);
        return '';
    });
}
function analyseComment(file, comment){
    var reg = /(@require\.async\s+)('[^']+'|"[^"]+"|[^\s;!@#%^&*()]+)/g;
    return comment.replace(reg, function(m, prefix, value){
        addAsync(file, value);
        return '';
    });
}
analyse [@require.async id] syntax in comment