First of all, here is a sample of a ChangeLog file, taken from the misc/ directory of the original a2ps package:
Sun Apr 27 14:29:22 1997 Akim Demaille <demaille@inf.enst.fr>
* base.ps: Merged in color.ps, since now a lot is
common [added box and underline features].
Fri Apr 25 14:05:20 1997 Akim Demaille <demaille@inf.enst.fr>
* color.ps: Added box and underline routines.
Mon Mar 17 20:39:11 1997 Akim Demaille <demaille@gargantua.enst.fr>
* base.ps: Got rid of CourierBack and reencoded_backspace_font.
Now the C has to handle this by itself.
Sat Mar 1 19:12:22 1997 Akim Demaille <demaille@gargantua.enst.fr>
* *.enc: they build their own dictionaries, to ease multi
lingual documents.
The syntax is really simple: A line specifying the author and the date of the changes, then a list of changes, all of them starting with an star followed by the name of the files concerned, then optionally between parentheses the functions affected, and then some comments.