This is a copy-paste from Simon's package and it refers only to the parse_ts function. Do you propose to reformat it and put at the top of the file? 

How about keeping this comment as it is and adding a complete copyright statement to the header as in vignete-r.r.

Anyways. It might be a good idea if you change it the way you like. Otherwise it might become a long story. But keep in mind that I still plan to modify/extend parse_ts in the future. And  may be, as you suggested, convert to Rcpp. So it is likely that only a small portion of original Simon's code will still stay.