optimized _tty_info()

.tmux.conf

@@ -525,7 +525,7 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 #   else
 #     ps -t "$tty" -o user=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX -o pid= -o ppid= -o command= | awk '
 #       NR > 1 && ((/ssh/ && !/-W/) || !/ssh/) {
-#         user[$2] = $1; parent[$2] = $3; child[$3] = $2; for (i = 4 ; i <= NF; ++i) command[$2] = i > 4 ? command[$2] FS $i : $i
+#         user[$2] = $1; parent[$2] = $3; child[$3] = $2; pid=$2; $1 = $2 = $3 = ""; command[pid] = $0
 #       }
 #       END {
 #         for (i in parent)