[css-shapes] revert accidental syntax edit

Author: astearns

css-shapes/Overview.html

@@ -555,7 +555,7 @@ <h4 id=basic-shape-syntax><span class=secno>3.2.2. </span>Syntax of Basic
 
 ellipse() = ellipse( &lt;shape-arg&gt;, &lt;shape-arg&gt;, &lt;shape-arg&gt;, &lt;shape-arg&gt; )
 
-polygon() = polygon( [&lt;fill-rule&gt;,]? [&lt;shape-arg&gt;]{2} [&lt;shape-arg&gt;]{2}# )
+polygon() = polygon( [&lt;fill-rule&gt;,]? [&lt;shape-arg&gt;]{2}# )
 
 &lt;shape-arg&gt; = &lt;length&gt; | &lt;percentage&gt;
 

css-shapes/Overview.src.html

@@ -488,7 +488,7 @@ <h4 id='basic-shape-syntax'>Syntax of Basic Shapes</h4>
 
 ellipse() = ellipse( &lt;shape-arg&gt;, &lt;shape-arg&gt;, &lt;shape-arg&gt;, &lt;shape-arg&gt; )
 
-polygon() = polygon( [&lt;fill-rule&gt;,]? [&lt;shape-arg&gt;]{2} [&lt;shape-arg&gt;]{2}# )
+polygon() = polygon( [&lt;fill-rule&gt;,]? [&lt;shape-arg&gt;]{2}# )
 
 &lt;shape-arg&gt; = &lt;length&gt; | &lt;percentage&gt;