How do I make sudo!! add a space after sudo?

Question

When I type sudo!! it never puts a space between sudo and anything. How do I make sudo!! add a space?

Example:

nano text.txt
sudo!!
sudonano text.txt

Maybe I am using it wrong but it never works unless I add a space after sudo.

Answer 1

You need to use

sudo !!

instead of sudo!!. This is intended behaviour. The !! history expansion, as stated in the documentation:

designates the preceding command. When you type this, the preceding command is repeated in toto.

It is simply as if !! were replaced with a find/replace with the contents of the last line. Naturally, since your line didn't start with a space, a space isn't included in the expansion.