tmux : add autocomplete for tr and tn.

.linux/bash/module/tmux.sh

@@ -65,9 +65,15 @@ tka()
 }
 
 # autocompletes.
-_ta()
+_tmux_sessions()
 {
   _autocomplete_first "$(tmux list-sessions 2> /dev/null | sed -e 's/:.*//')"
 }
 
-complete -F _ta ta tk
+_tmux_names()
+{
+  _autocomplete_first "${PWD##*/}"
+}
+
+complete -F _tmux_sessions ta tk
+complete -F _tmux_names tr tn