[css-grid] grid-template-row/column "none" definition

The CSS Grid spec for 5.1 grid-template-rows & grid/template-columns has:

Name:	grid-template-columns, grid-template-rows
Value:	none | <track-list> | subgrid <line-name-list>?

Is that correct that a “none” property still allows a <line-name-list> to be associated with it?

Should it be:

Value:	none | [ <track-list> <line-name-list>? | subgrid <line-name-list>? ]

or:

Value:	none | [ [ <track-list> | subgrid ] <line-name-list>? ]

Thank you,

-bobby
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Bobby Mozumder
Editor-in-Chief
FutureClaw Magazine
mozumder@futureclaw.com
1-240-745-5287
www.futureclaw.com
www.twitter.com/futureclaw