Shell command not working as expected -

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i trying write shell command append ',' @ end of each line , output result new file. have written following code- 

 sed -e 's/$/,/g' -e '$ s/,$//' name.txt > output

the above code executes , places comma operator in new line, i.e. if input file is

aabbcc ddeeff

the output shown is-

aabbcc , ddeeff

instead of

aabbcc, ddeeff

what changes should make expected output ? tried 

awk '{print $0","}' name.txt > output

but displays output file above.


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