General :: Output A Text File In Proper Format?

it compares two files using md5... if they are same , a corresponding character is output to a text file .. but the problem is it gets appended by default.. is there any way to output in a normal way because the text is a message and it should be of proper format
here is my script

Code:

#!/bin/bash
g=`tail -1 new.txt|head -n 1`
array=( a b c d e f g h i j k l m n o p q r s t u v w x y z )
for((i=1 ; i <$g+1 ; i++))

[code]....

the message is supposed to be hello , i need to get rid of the endlines somehow..