tmux: add a key binding to capture a pane's history

config/tmux/tmux.conf

@@ -7,6 +7,9 @@ bind    C-space send-prefix
 bind    R       source-file "$XDG_CONFIG_HOME/tmux/tmux.conf"\; display "RELOADED"
 bind    v       copy-mode
 bind    p       paste-buffer
+bind    C       command-prompt -p 'Save pane history:' \
+                               -I '~/tmux.history' \
+                               'capture-pane -S -32768 ; save-buffer %1 ; delete-buffer'
 
 # Window/pane management (new windows/panes use the path in current pane)
 bind    c       new-window      -c '#{pane_current_path}'