cleaned up bashisms

abmux.sh

@@ -15,7 +15,7 @@ while true; do
   slist="$(nl -nln -w1 -s' - ' "$SPFILE")"
   sname="$(printf '%s\nNew\nQuit\n' "$slist" | grep . | fzf --tac --footer="$FTR")"
   [ "$sname" = 'Quit' ] && break
-  [ "$sname" = 'New' ] && read -r -p 'New session name: ' sname
+  [ "$sname" = 'New' ] && printf 'New session name: ' && read -r sname
   sname="$(echo "$sname" | sed -E 's/^[0-9]+\ -\ //')"
   if [ -n "$sname" ]; then
     expect -c "spawn abduco -A \"$sname\" $SHELL; send \"\014\"; interact"