https://github.com/UoMResearchIT/programming_with_python/blob/d0bf10d1adf272e13a351a15d63b04adf3b12645/episodes/06-units_and_quantities.md?plain=1#L219 "dopplr_radio" -> "doppler_radio"
https://github.com/UoMResearchIT/programming_with_python/blob/d0bf10d1adf272e13a351a15d63b04adf3b12645/episodes/06-units_and_quantities.md?plain=1#L219
"dopplr_radio" -> "doppler_radio"