[css-fonts-4] Add range notation

Author: cdoublev

css-grid-2/Overview.bs

@@ -1593,11 +1593,11 @@ Explicit Track Sizing: the 'grid-template-rows' and 'grid-template-columns' prop
 		<dfn>&lt;explicit-track-list></dfn> = [ <<line-names>>? <<track-size>> ]+ <<line-names>>?
 
 		<dfn>&lt;line-name-list></dfn>      = [ <<line-names>> | <<name-repeat>> ]+
-		<dfn>&lt;track-size></dfn>          = <<track-breadth>> | minmax( <<inflexible-breadth>> , <<track-breadth>> ) | fit-content( <<length-percentage>> )
+		<dfn>&lt;track-size></dfn>          = <<track-breadth>> | minmax( <<inflexible-breadth>> , <<track-breadth>> ) | fit-content( <<length-percentage [0,∞]>> )
 		<dfn>&lt;fixed-size></dfn>          = <<fixed-breadth>> | minmax( <<fixed-breadth>> , <<track-breadth>> ) | minmax( <<inflexible-breadth>> , <<fixed-breadth>> )
-		<dfn>&lt;track-breadth></dfn>       = <<length-percentage>> | <<flex>> | min-content | max-content | auto
-		<dfn>&lt;inflexible-breadth></dfn>  = <<length-percentage>> | min-content | max-content | auto
-		<dfn>&lt;fixed-breadth></dfn>       = <<length-percentage>>
+		<dfn>&lt;track-breadth></dfn>       = <<length-percentage [0,∞]>> | <<flex [0,∞]>> | min-content | max-content | auto
+		<dfn>&lt;inflexible-breadth></dfn>  = <<length-percentage [0,∞]>> | min-content | max-content | auto
+		<dfn>&lt;fixed-breadth></dfn>       = <<length-percentage [0,∞]>>
 		<dfn>&lt;line-names></dfn>          = '[' <<custom-ident>>* ']'
 	</pre>
 
@@ -1607,7 +1607,7 @@ Explicit Track Sizing: the 'grid-template-rows' and 'grid-template-columns' prop
 Track Sizes</h4>
 
 	<dl dfn-for="grid-template-columns, grid-template-rows" dfn-type=value>
-		<dt><dfn><<length-percentage>></dfn>
+		<dt><dfn><<length-percentage [0,∞]>></dfn>
 		<dd>
 			A non-negative length or percentage, as defined by CSS3 Values. [[!CSS-VALUES-3]]
 
@@ -1624,7 +1624,7 @@ Track Sizes</h4>
 			and then resolve against that resulting <a>grid container</a> size
 			for the purpose of laying out the <a>grid</a> and its items.
 
-		<dt><dfn><<flex>></dfn>
+		<dt><dfn><<flex [0,∞]>></dfn>
 		<dd>
 			A non-negative dimension with the unit ''fr'' specifying the track's <dfn dfn noexport>flex factor</dfn>.
 			Each <<flex>>-sized track takes a share of the remaining space in proportion to its <a>flex factor</a>.