@echo off
type nul>formal.txt
for /f "tokens=1,2" %%a in (informal.txt) do echo %%a:%%b>>formal.txt
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@echo off
for /f "tokens=1,2 delims= " %%i in ('type informal.txt') do (
echo %%i:%%j>>formal.txt
)
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@echo off
for %%a in (%~dp0*.txt) do (
  >"%%~dpadone_%%~nxa" cd.
  for /f "usebackq tokens=1,2" %%h in ("%%a") do (
    >>"%%~dpadone_%%~nxa" echo %%h:%%i
  )
)
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