normalize repetitive columns csvtate csvtate repetitive_input.csv normalized_output.csv a,b1,b2,c1,c2 1,2,3,4,5 | v a,b,c 1,2,4 1,3,5 Install GitHub Releases https://github.com/shu-go/csvtate/releases Go install go install github.com/shu-go/csvtate@latest