find and replace strings in glob

gistfile1.txt

 # $@ and $* are the same without quotes, but with quotes
 # $* is one quoted string containing all args, $@ is one quoted string
 # for each arg. This handles spaces in filenames correctly.
 FINDSTR=${1};
 REPSTR=${2};
 shift;
 shift;
 
 echo "replace ${FINDSTR} with ${REPSTR} in" "$@"
 for FN in "$@"
 do
   ruby -p -i -e "gsub('${FINDSTR}', '${REPSTR}')" "${FN}"
 done