What's the Windows command shell equivalent of Bash's `true` command?

Question

I have written a Vim plugin which shells out to run external commands. Two of the commands I run are diff and grep which can each exit with a non-z

Answer 1

cd .

also sets %ERRORLEVEL% to 0 but runs a bit faster and writes a bit shorter than ver>nul. Example:

mkdir . 2>nul || cd .