I tried to edit an answer of someone else and got this message:

Oops! Your edit couldn't be submitted because:

• body must be at least 30 characters; you entered 19

It's this answer: https://superuser.com/a/112134/151741

I wanted to change

Ctrl + Alt + D

to

<kbd><kbd>Ctrl</kbd> + <kbd>Alt</kbd> + <kbd>d</kbd></kbd>

Was the minimum character limit changed sometime? Would this mean that all answers that were created before can't be edited anymore?