C:\foo>type foo.bat
@echo OFF

echo "making test file"
perl -e "print \"foo\r\nbar\r\nstuff\";" > f.txt
echo "showing test file"
perl -pe "s/(\s)/'['.ord($1).']'/esg" f.txt

echo "altering file"
perl -i.bak -pe "s/\r(?=\n)//" f.txt
echo "showing result"
perl -pe "s/(\s)/'['.ord($1).']'/esg" f.txt

C:\foo>foo.bat
"making test file"
"showing test file"
foo[13][10]bar[13][10]stuff
"altering file"
"showing result"
foo[10]bar[10]stuff
C:\foo>