Including Tailwind via CDN causes html5validator to fail

[kschmott]

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Describe the bug

A clear and concise description of what the bug is. Here are a few ideas.

A copy-paste of a traceback (prefer text, not screenshot)

$ python test.py
  File "test.py", line 2
    print(f"x = {x}")
                   ^
SyntaxError: invalid syntax

A quote from the source code of a public unit test.

def test():
    print(f"x = {x}")

A quote from the spec

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To Reproduce

Steps to reproduce the behavior.

1. Use a Python f-string in solution code
2. Submit code to the autograder

Expected behavior

Test should pass without an error about unsupported syntax.