[css-values-3] Copy over grammar fix from issue w3c#1241, which afaict was intended for L3.

Author: fantasai

css-values-3/Overview.bs

@@ -1557,8 +1557,11 @@ Syntax</h4>
 	<pre class='prod'>
 	<<calc()>> = calc( <<calc-sum>> )
 	<dfn>&lt;calc-sum></dfn> = <<calc-product>> [ [ '+' | '-' ] <<calc-product>> ]*
-	<dfn>&lt;calc-product></dfn> = <<calc-value>> [ '*' <<calc-value>> | '/' <<number>> ]*
+	<dfn>&lt;calc-product></dfn> = <<calc-value>> [ '*' <<calc-value>> | '/' <<calc-number-value>> ]*
 	<dfn>&lt;calc-value></dfn> = <<number>> | <<dimension>> | <<percentage>> | ( <<calc-sum>> )
+	dfn>&lt;calc-number-sum></dfn> = <<calc-number-product>> [ [ '+' | '-' ] <<calc-number-product>> ]*
+	<dfn>&lt;calc-number-product></dfn> = <<calc-number-value>> [ '*' <<calc-number-value>> | '/' <<calc-number-value>> ]*
+	<dfn>&lt;calc-number-value></dfn> = <<number>> | ( <<calc-number-sum>> )
 	</pre>
 
 	In addition, <a href="https://www.w3.org/TR/css-syntax/#whitespace">white space</a>
@@ -2097,10 +2100,17 @@ Changes</h2>
 			This effectively removes that syntax from 'object-position',
 			but allows <<position>> to be re-used e.g. in [[CSS-TRANSFORMS-1]] for 3D positions.
 			(See <a href="https://lists.w3.org/Archives/Public/www-style/2017Feb/0052.html">discussion</a>.)
-		<li>Clarified handling of font-relative units outside the context of an element.
-		<li>Clarified definition of ''url()'' to normatively accept unquoted syntax.
+		<li>Fixed grammar error that disallowed numeric expressions as denominators in ''calc()''.
+			(<a href="https://drafts.csswg.org/css-values-3/issues-cr-2016#issue-12">Issue 12</a>)
+		<li>Defined handling of font-relative units outside the context of an element.
+			(<a href="https://drafts.csswg.org/css-values-3/issues-cr-2016#issue-9">Issue 9</a>)
+		<li>Clarified that high-resolution screens should anchor on device pixels, not physical units.
+			(<a href="https://drafts.csswg.org/css-values-3/issues-cr-2016#issue-8">Issue 8</a>)
+		<li>Clarified definition of ''url()'' to normatively say that it accepts unquoted syntax.
 	</ul>
 
+	A <a href="https://drafts.csswg.org/css-values-3/issues-cr-2016">Disposition of Comments</a> is available.
+
 	Changes since the <a href="https://www.w3.org/TR/2015/CR-css-values-3-20150611/">11 June 2015 Candidate Recomendation</a> are:
 
 	<ul>

css-values-3/issues-cr-2016.bsi

@@ -56,7 +56,7 @@ Summary:  Categorize high-res screens with low-res screens, not print.
 From:     Patrick Lauke
 Comment:  https://github.com/w3c/csswg-drafts/issues/708
 Response: https://github.com/w3c/csswg-drafts/issues/708#issuecomment-260529072
-Open:     Needs edits
+Open:     Edits are problematic, see https://github.com/w3c/csswg-drafts/issues/708#issuecomment-302240095
 Resolved: https://lists.w3.org/Archives/Public/www-style/2016Nov/0085.html
 ----
 Issue 9.

css-values-3/issues-cr-2016.html

@@ -91,7 +91,7 @@ <h1>CSS Values and Units Level 3 Disposition of Comments for 2016-09-29 CR</h1>
 <span>From:     Patrick Lauke</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/708'>https://github.com/w3c/csswg-drafts/issues/708</a></span>
 <span>Response: <a href='https://github.com/w3c/csswg-drafts/issues/708#issuecomment-260529072'>https://github.com/w3c/csswg-drafts/issues/708#issuecomment-260529072</a></span>
-<span class="">Open:     Needs edits</span>
+<span class="">Open:     Edits are problematic, see <a href='https://github.com/w3c/csswg-drafts/issues/708#issuecomment-302240095'>https://github.com/w3c/csswg-drafts/issues/708#issuecomment-302240095</a></span>
 <span>Resolved: <a href='https://lists.w3.org/Archives/Public/www-style/2016Nov/0085.html'>https://lists.w3.org/Archives/Public/www-style/2016Nov/0085.html</a> <a href="https://www.w3.org/Mail/flatten/index?subject=https%3A%2F%2Flists.w3.org%2FArchives%2FPublic%2Fwww-style/2016Nov/0085.html"><abbr title="Thread">&#x2208;</abbr></a></span></pre>
 <pre class=' a' id='issue-9'>
 <span>Issue 9. <a href='#issue-9'>#</a></span>