I mean CVS and I have had our differences in the past, but now it's hurt my feelings
The "I HATE YOU" is part of the CVS protocol. It says "I LOVE YOU" for success.
See page 4 of http://www.wandisco.com/techpubs/cvs-protocol.pdf
The CVS protocol is one giant mass of WTFs, though.
I think an I HATE YOU popup made it into the first pop-up potpourri.
Subversion loves everybody.
Subversion duplicates half the CVS WTFs, so that CVS users don't get "confused".