[Iska]

Код:

@echo off
setlocal enableextensions enabledelayedexpansion

>"NewFile.txt" (
	for /f "usebackq delims=" %%i in ("0001.txt") do echo  %%i 
)

endlocal
exit /b 0

Код:

$sFile = "E:\Песочница\0342\0001.txt"

(Get-Content -Path $sFile) -replace '^(.*)$', ' $1 ' | Out-File -FilePath $sFile