cvs prune question

[Daniels, Dave F]

Hi,

When updating a module using the command 'cvs update', CVS prints lines
which look something like this.

M  project/src/com/company/Test1.java
M  project/src/com/company/Test2.java
P  project/src/com/company/Test3.java

I know the M means merge, and I suspect the P means prune. Can someone
confirm that for me? If that's true, why is it performing this action
without the -P switch, and what does it mean in this context?

Thanks for your help,
Dave