unknown command turns backspace into recursive error generator

[kyeotic]

Here is a fun one.

• Go to https://unix.bpowers.net/
• enter any bad command (try cd or dfgug)
• Hit backspace/delete twice (repeat for recursive errors!)

[aghoneim92]

What's interesting is that whether or not a bad command was issued this error occurs. It's not a problem with Browsix, just the terminal GUI.