The manual says,
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Some parameters are only meaningful for frames on certain kinds of display (@pxref{Frames}). If @var{alist} includes parameters that are not meaningful for the @var{frame}'s display, this function will change its value in the frame's parameter list, but will otherwise ignore it.
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So, my question is,
Either 'not' or 'otherwise' is not necessary, isn't it?
(Because I learned English several decades ago, I am not confident this, sorry.)
Thanks.