Output missing for print statement in units chapter

[andrewgait]

Add output from the print statement at https://github.com/UoMResearchIT/programming_with_python/blob/d0bf10d1adf272e13a351a15d63b04adf3b12645/episodes/06-units_and_quantities.md?plain=1#L56

[andrewgait]

In fact this is true of a number of the print statements in this chapter, so perhaps it's a deliberate choice not to display the result in the notes? Any opinions @Scottan?

[Scottan]

I noticed this as well when doing my changes for f-strings. I suspect it was an over-sight when writing this chapter.

My opinion would be to add the output for consistency with the rest of the course (at least for the examples that are not problems for the students to do). I'd mark this as fairly low priority though