* helm-command.el (helm-command-M-x-sort-fn): Use string-less-p when pattern is empty.
* helm-command.el (helm-command-M-x-sort-fn): Fix typo.
* helm-command.el (helm-command-M-x-sort-fn): Match against the cdr (real).
* helm-command.el (helm-M-x-requires-pattern): Fix docstring.