more supported grep usage

qcd_function

@@ -70,7 +70,7 @@ function qcd() {
     if [ -z "$1" ]
     then \cd
     else
-     d=$( tac ~/.bash_cdhistory | grep -h ^"$1" ~/.qcd - | head -n 1 )
+     d=$( grep -h ^"$1" ~/.qcd <( tac ~/.bash_cdhistory ) | head -n 1 )
      d=${d/*:/}
      if [ ! -z "$d" ]
      then \cd "$d"