[tmux] fix binding incompatibility issue

.tmux.conf

@@ -73,11 +73,11 @@ bind s split-window -v -c '#{pane_current_path}';
 
 is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
     | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
-bind-key -n C-h if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
-bind-key -n C-j if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
-bind-key -n C-k if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
-bind-key -n C-l if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
-bind-key -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
+bind-key -n 'C-h' if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
+bind-key -n 'C-j' if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
+bind-key -n 'C-k' if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
+bind-key -n 'C-l' if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
+bind-key -n 'C-\' if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
 
 bind -r < resize-pane -L 3
 bind -r > resize-pane -R 3