Error only when running whole block of code

Question

I have code that came with a dataset that I downloaded. This code is supposed to convert factor variables to numeric. When I run each line individually, it works fine, but

Answer 1

I figured out the issue (actually someone told me what the problem was)

The code was downloaded as a .R file and must have been written using a text editor with non-standard "new line" coding. So I just copied the code to a text editor, did replace all to switch "\n" to "#####". Then I used replace all again to switch back to new-lines and copied it back into R studio.

And everything works!