@echo off
for /f "tokens=1 delims=," %%i in (1.txt) do echo %%i
pause
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@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (1.txt) do (
    set a=%%i
    if "!a:~-1!"=="," (echo !a:~0,-1!) else (echo !a!)
)
pause
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sed i.txt "N;s/,\nFROM/\nFROM/;P;D" 1.txt
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@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('dir /b *.txt') do (
for /f "tokens=1* delims=:" %%i in ('findstr /e /n "," "%%a"') do set m=%%i
set n=1
for /f "delims=" %%s in ('type "%%a"') do (
set "str=%%s"
if !n! == !m! (
>>$ echo,!str:~0,-1!
) else (
>>$ echo,!str!
)
set /a n+=1
)
move $ "%%a"
)
pause
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sed "s/,$//g" 1.txt
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