The added testcase used to become
Apr,May,Oct,Nov, Dec: Mo-Su, 10:00-19:00; Jun-Sep: Mo-Su 10:00-20:00
with an erroneous space before "Dec".

I don't claim full understanding of the autocorrect() code, this is
just the result of reverse-engineering which part of the condition
was wrong, removing it, and noticing that other tests still pass :)