Interpolation caveat and typo

[PallHaraldsson]

No description provided.

[PallHaraldsson]

I was staring at my code for long, knowing interpolation worked for me before.

E.g. in my case this worked:
py"""client.save_dataframe('ssys.econ.inflation_fixings_'+$(replace(string(today()), "-"=>"")), pdf_today)"""

but not:

py"""client.save_dataframe('ssys.econ.inflation_fixings_$(replace(today(), "-"=>""))', pdf_today)"""

And of course the failing tests are not my fault, as this is just docs, why I tried to skip them (and not sure why that didn't happen).