These typos occur in the package description of 2.4.1-17.2 ($ apt-cache show atm-dev) which is current in all versions of Debian (including sid), and Ubuntu.
The package describes itself as obsolete see bug #321826 (and #498773) so this bug is not worth addressing and can remain closed but the package should probably be removed. The bug was filed as part of spell checking every package description in Debian, I probably should have read this one more closely. Simon -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org