Broken tags are shown, only if no gt sign can be found.

</

close tag starts with CR, this is trashed with the invalid tag.
<br>
aaaaaaaaaaaa

</  close tag without tag name, start with space, this is trashed with the invalid tag.
<br>
bbbbbbbb

<

open tag without name, stat with space, treated as text.
<br>
KKKKKKKKKK

<  open tag has no tag name, stat with space, treated as text.
<br>
ccccccc
</
dddd