The tests were checking that the source-span of parsed HTML nodes were accurate, but they were not checking the span when it includes the "leading trivia", which are given by the `fullStart` rather than `start` location. PR Close #42062
The tests were checking that the source-span of parsed HTML nodes were accurate, but they were not checking the span when it includes the "leading trivia", which are given by the `fullStart` rather than `start` location. PR Close #42062