Batch Script for editing something in a file in DOS

The below Batch script will find something inside a file and replace it with something of your wish 

@echo off
setlocal enabledelayedexpansion

if not exist "%1" (echo this file does not exist...)&goto :eof

set  /p findthis=Enter here what you want to find:
set  /p replacewith=Enter here what you want to replace:
for /f "delims= tokens=* eol=^ " %%a in (%1) do (
   set write=%%a
   if %%a==!findthis! set write=!replacewith!
   echo !write!
   echo !write!>>%~n1.replaced%~x1
)

donot add a space after the varialbe in the last line.. this will add a space after the line in your output.  I took three hours to find and fix this bug.