examples in regularizing ragged csv section need small change

[jganong]

in the documention section about Regularizing Ragged CSV
the code examples have "--fs comma" before "--nidx",
but this does not work, apparently --nidx resets the FS and all the lines have NF == 1.
instead if you put "--nidx" followed by "--fs comma" it appears to work fine.

i am using mlr 6.0.0 on arch linux

(base) [jeg@lanternfish tom]$ echo 'eprint IFS' | mlr repl --fs x --nidx

(base) [jeg@lanternfish tom]$ echo 'eprint IFS' | mlr repl --nidx --fs x
x

thanks

[johnkerl]

Thank you @jganong !!

In case the documentation was fine; you surfaced a bug which is fixed on #912