Before aliases used spaces in their name,
now the alias part is being read only before the first space,
thus allowing execution of complex command with aliases.
Example (with plugin):
`/alias add echo "/system exec echo"`
will allow execution of
`/echo test`
as opposed to prior state when the Profanity will
search for alias "echo tests" and output `Unknown command: /echo test`
Minor change: removed an example with invalid command (`/away`)
9ecade9919