cli.md: More typos

I've seen one other missing space that I addressed in another PR already.
I don't know whether that is a common occurrence in the docs.

About the second diff chunk, it looks like some copy-paste mistake to me.

Docker-DCO-1.1-Signed-off-by: Felix Rabe <felix@rabe.io> (github: felixrabe)
Merge pull request #5568 from felixrabe/patch-6

cli.md: More typos