mirc eats multiple spaces up (and leading/trialing ones)
you can use a ctrl-o at the start of the line to make the first space not a leading one (ctrl-o is change text to ordinary)
//echo example
or if u ned two spaces in the middle of a line, and there might be ofther codes before it then you could use ctrl-b ctrl-b (toggle bold, toggle it again)
//echo this is an example (ctrl-r just added for effect)
see how there is no bold, becuase you turned it on then off, same event if it was on then it gets turned off then on