name: A closing tag spelled with a Kelvin sign still closes the block
why: An HTML block ends where its closing tag appears, and the tool finds that tag by lowercasing the whole line and looking for an ASCII needle. Lowercasing is the one thing this transform still takes from the runtime rather than stating itself, and the reason it cannot be narrowed to ASCII is here: `U+212A` is not ASCII and its lowercase is, so `</BLOC{KELVIN SIGN}QUOTE>` folds to `</blockquote>` and closes the block, and the prose after it is prose. An implementation folding only ASCII leaves the block open to the end of the file and joins nothing, which is what the counts on this case separate. Only two characters outside ASCII fold into it -- this one and the dotted capital I in the sibling case -- so the pair covers the whole of what that dependency can reach.
paragraphs_unwrapped: 1
line_breaks_removed: 1
