C-a binding for nvim and tux

[daibertdiego]

Hey man, I'm coming from your vim Frontend Masters course and you mentioned there that you had to press C-a twice to increment a number inside vim because you were using Tmux. I'm facing the same issue here and I would like to make it work for me but I didn't find any explicit configuration in your tmux or nvim config files. Thanks a lot for your help and knowledge sharing.