c762cdf21d
Previously the VtrSendLinesToRunner command was implemented by joining the lines together with `\r` newline characters and then sending them via a single batch `tmux send-keys` call. This caused some REPLs (pry most notably) to display all the lines at once, and occasionally mis-handle the sent text. With this change, each line is now sent via a distinct `tmux send-keys` call, better approximating a user interacting with the REPL.