17_Project - should be getting an error

[sociologyquinn]

1.2 Load in multiple files: why don't we get an error when print(__) is run without making the appropriate changes? It prints a bunch of output without needing to change to "print(file)"

[emilygrabowski]

This isn't an error, but _ and __ are magic variables referring to previous cell results. I extended the _______ so that it doesn't line up with any of the magic variables (which will be coming up in the next PR). We should also revisit the use of ___ in these partially-complete cells because of the possibility of confusion.