Because "don't" is easier to read than 'don\'t'
If you’re on a Mac, Option-Shift-] will type it.
EDIT: I misinterpreted that single quote as a backtick. In any case, both single and double quotes are common in SQL, but single quotes are a bit more common.
print("\"Hello\" he said")
to print('"Hello" he said')
I think pretty much all formatters for languages that let you use either quote do this. It makes sense.