formatting output

I have a program that reads through a text file and prints output from it to another text file. My problem is that the output does not print all on the same line (horizontally). Does anyone know how to format the output so that it prints on the same line?
For example:

current output looks like this:
2701
(tab) AAA
(tab)(tab) 20
(tab)(tab)(tab) 20

I want it to look like this:
2701 AAA 20 20


Thanks!

Read the input lines into a local string variable, then write that string variable to the output file.