Batcher

测试之前请做好备份

@echo off
for /f "delims=" %%a in ('dir /b /a-d *.txt') do (
    call :step1 "%%a"
    >>"%%a.new" more +1 "%%a"
    move /y "%%a.new" "%%a"
)

:step1
for /f %%i in ('type "%~1"') do (
    >"%~1.new" echo,%%i
    goto :eof
)
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