GNU Coding Standards
6.7 The NEWS File
In addition to its manual, the package should have a file named
`NEWS' which contains a list of user-visible changes worth
mentioning. In each new release, add items to the front of the file and
identify the version they pertain to. Don't discard old items; leave
them in the file after the newer items. This way, a user upgrading from
any previous version can see what is new.
If the `NEWS' file gets very long, move some of the older items
into a file named `ONEWS' and put a note at the end referring the
user to that file.