function assertPrettifiesTo(actual, expected) {
    assert.equal(typeof actual, 'string', 'First argument must be a string');
    assert.equal(typeof expected, 'string', 'Second argument must be a string');

    const expectedStr = prettifyHTML(expected);
    const actualStr = prettifyHTML(actual);

    assert.equal(actualStr, expectedStr);
}
Asserts that the given HTML string prettifies to match the expected string
@param {string} actual - The actual HTML string to test
@param {string} expected - The expected HTML string