Test to make sure we remove span tags with no attributes if we removed the last attribute.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS one underline command converted test to test
PASS one underline command converted test to test
PASS two underline commands converted test to test
PASS one strikethrough command converted test to test
PASS one strikethrough command converted test to test
PASS two strikethrough commands converted test to test
PASS one strikethrough command converted test to test
PASS one underline command converted test to test
PASS one strikethrough command converted test to test
PASS one underline command converted test to test
PASS successfullyParsed is true
TEST COMPLETE