[css-backgrounds-4] Fix ignored vars warning by not using <var> here, which matches the way other specs define grammar productions.

Author: dbaron

css-backgrounds-4/Overview.bs

@@ -45,7 +45,7 @@ Background Positioning: the 'background-position' shorthand property</h3>
 	See [[CSS3BG]] for definition.
 
 	<p>Where
-	<pre class=prod><dfn><var>&lt;position&gt;</var></dfn> = [
+	<pre class=prod><dfn>&lt;position&gt;</dfn> = [
 	  [ left | center | right | top | bottom | start | end | <var>&lt;percentage&gt;</var> | <var>&lt;length&gt;</var> ]
 	|
 	  [ left | center | right | x-start | x-end | <var>&lt;percentage&gt;</var> | <var>&lt;length&gt;</var> ]

css-backgrounds-4/Overview.html

@@ -347,7 +347,7 @@ <h3 class="heading settled" data-level="2.1" id="the-background-position"><span
    </table>
    <p>See <a data-link-type="biblio" href="#biblio-css3bg">[CSS3BG]</a> for definition.</p>
    <p>Where </p>
-<pre class="prod"><dfn class="dfn-paneled" data-dfn-type="type" data-export="" data-lt="<position>" id="typedef-position"><var>&lt;position></var><span class="dfn-panel" data-deco=""><b><a href="#typedef-position">#typedef-position</a></b><b>Referenced in:</b><span><a href="#ref-for-typedef-position-1">2.1. 
+<pre class="prod"><dfn class="dfn-paneled" data-dfn-type="type" data-export="" data-lt="<position>" id="typedef-position">&lt;position><span class="dfn-panel" data-deco=""><b><a href="#typedef-position">#typedef-position</a></b><b>Referenced in:</b><span><a href="#ref-for-typedef-position-1">2.1. 
 Background Positioning: the background-position shorthand property</a></span></span></dfn> = [  [ left <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> center <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> right <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> top <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> bottom <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> start <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> end <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> <var>&lt;percentage></var> <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> <var>&lt;length></var> ]
 <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a>
   [ left <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> center <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> right <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> x-start <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> x-end <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> <var>&lt;percentage></var> <a data-link-type="grammar" href="https://drafts.csswg.org/css-values-3/#comb-one">|</a> <var>&lt;length></var> ]