`copy_exec` was stupid since it brought unnecessary shell overhead even
though it was meant to improve performance (one could argue that it is
not even necessary here).
Continue the idea of reducing calls to `tmux` by "globally" chaining
together all copy-mode commands instead of doing it only "locally" with
`copy_exec`. This has the added benefit that also calls having arguments
can be included and merged.
Julian Prein
ec417a439c
