Re: ispell-change-dictionary does no SPC completion

[Richard Stallman]

    >     M-x ispell-change-dictionary
    >     SPC
    >
    >     There is no completion of the *completions* buffer even though the
    >     buffer does not fully display the alternatives.
    >
    > I do not understand those words.  What do you mean by "completion of
    > the *completions* buffer"?
    >

    I'm sorry, I meant scrolling of the *completions* buffer (when there are
    more completions in the buffer than the window displays).

That is not a bug.  There is no feature to make SPC scroll in such
situations.

What led you to think that SPC would have this effect inside the
minibuffer?