Clang-format with parameter packs

I think clang-format changed how parameter packs were formatted by default in a new verison. I'll merge it and see if I can't set the setting on our clang-format parameter file to manually specify so it isn't clang-format version dependent.

For some reason it now wants  `AtPad *AddPad(Ts &&...params)` instead of ` AtPad *AddPad(Ts &&... params)`