File, where last line ends in an ordinal number.  If you want to continue
editing on the next line, you must manually exit superscript mode.  (Which an
average user doesn't know the key combination for, nor do they want to go
digging through the menus to turn it off)

For instance, come in, type file and then at end of a line type 1st and the auto
formatting kicks in and puts it into superscript (AWESOME!)  Then when I later
return and want to add text to the file... I click at the end of my file... the
furthest point in the file I can, right after the 1st.  And I'm in superscript
still.  

This is a feature to continue typing in superscript... but when entering
newlines after the superscript and its the end of the file... Having to go look
up how to turn on & off superscript manually is semi-annoying.