use this to put encoding utf-8 in you ruby files

utf8.sh

#! /bin/bash

for f in `find . -name *.rb`
do
  sed -n '1p;' $f | grep -E '^#(coding| coding|-\*-| -\*-)' > /dev/null
  if [ $? != 0 ]
  then
    sed -i '1i #coding: utf-8' $f
  fi
done