Unicode apostrophes in poem.txt

[wqweto]

JFYI, copying poem.txt from 12.2 Reading a File opened in Chrome into VSCode does not produce utf-8 file but the text apostrophes are non-ASCII character ’. (Is this written in Word?)

The sample code subsequently panicked with stream did not contain valid UTF-8.

Converting poem.txt to utf-8 fixed the issue here. Getting rid of the Unicode apostrophes will fix it for everyone else using VSCode in first place.

[carols10cents]

Ugh this is so embarrassing because we've literally fixed this twice before, and I can't explain why it was still around in half of the instances of the poem we have around the repo but not the other half... but I think I've really fixed all instances of this now, on master. The book rides the release trains so it won't be fixed on doc.rust-lang.org/stable/book for a while, but thank you!