<U+FEFF> character showing up in files. How to remove them?

gistfile1.txt

1) In your terminal, open the file using vim:

vim file_name
2) Remove all BOM characters:

:set nobomb
3) Save the file:

:wq


// taken from:

http://stackoverflow.com/questions/7297888/ufeff-character-showing-up-in-files-how-to-remove-them

Another recipe using awk 
http://stackoverflow.com/questions/1068650/using-awk-to-remove-the-byte-order-mark

awk '{ if (NR==1) sub(/^\xef\xbb\xbf/,""); print }' INFILE > OUTFILE

thamks

In a script:

#!/bin/bash

awk '{ gsub(/\xef\xbb\xbf/,""); print }' $1 > /tmp/feff && mv /tmp/feff $1