Fix history editing issue in tmux (xterm-256color)
Fix history editing issue in tmux (xterm-256color)

This would cause an issue when restoring from history (arrow up) in
ssh, irb, pry, etc. where the new characters would seem to overwrite
the old one instead of inserting before them.

Also fixed a vim-airline color issue

ejoubaud/dotfiles,ejoubaud/dotfiles