fixed a minor thing in the last commit

tmux.conf

@@ -31,8 +31,8 @@ bind Escape copy-mode
 set -s escape-time 50
 
 # switch windows
-bind -r j previous-window
+bind -r C-j previous-window
-bind -r k next-window
+bind -r C-k next-window
 
 # splitting
 unbind %