Emacs saves old version of files when there are CVS KEYWORDS!?! HOW STOP???

[Christian Seberino]

I added $Date$ to my files.  This is a CVS keyword to give date of last
version of file.

Emacs insists on saving old version of my files if it sees $Date$.

How stop this???

Here is an example...

(home /home/seberino/MAIN/PyGnuma) % ls -l e*
-rwxrwxr-x    1 seberino seberino     7274 Sep  3 21:16 expression.py
-rwxrwxr-x    1 seberino seberino     7157 Sep  3 21:03 expression.py.~1.17.~

CS