The Eshell manual isn't as thorough as it could be about how users 
should invoke commands. While there's a reasonable amount of 
documentation about the details, it never directly describes how to run 
a simple command.

Attached is a patch to remedy this. I also corrected the documentation 
about how Eshell picks what command to run in command form; previously, 
it stated that ordinary Lisp functions had higher priority than external 
commands, which isn't actually the case (unless you set 
'eshell-prefer-lisp-functions').

Since this is purely a documentation change, I'd like to merge this to 
the Emacs 29 branch.