[css-backgrounds] Replaced asterisks in syntaxes for properties by hashes (#282)

Author: SebastianZ

css-backgrounds/Overview.src.html

@@ -307,8 +307,7 @@ <h3 id="the-background-image">Image Sources: the 'background-image' property</h3
       <td><dfn>background-image</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;bg-image&gt;</var>
-      [ , <var>&lt;bg-image&gt;</var> ]*
+      <td><var>&lt;bg-image&gt;</var>#
     <tr>
       <th>Initial:
       <td>none
@@ -397,7 +396,7 @@ <h3 id="the-background-repeat">Tiling Images: the 'background-repeat' property</
       <td><dfn>background-repeat</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;repeat-style&gt;</var> [ , <var>&lt;repeat-style&gt;</var> ]*
+      <td><var>&lt;repeat-style&gt;</var>#
     <tr>
       <th>Initial:
       <td>repeat
@@ -556,7 +555,7 @@ <h3 id="the-background-attachment">Affixing Images: the 'background-attachment'
       <td><dfn>background-attachment</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;attachment&gt;</var>	[ , <var>&lt;attachment&gt;</var> ]*
+      <td><var>&lt;attachment&gt;</var>#
     <tr>
       <th>Initial:
       <td>scroll
@@ -668,7 +667,6 @@ <h3 id="the-background-position">Positioning Images: the 'background-position' p
       <th><a href="#values">Value</a>:
 
       <td><var>&lt;position&gt;</var>
-        [ , <var>&lt;position&gt;</var> ]*
     <tr>
       <th>Initial:
       <td>0% 0%
@@ -858,7 +856,7 @@ <h3 id="the-background-clip">Painting Area: the 'background-clip' property</h3>
       <td><dfn>background-clip</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;box&gt;</var> [ , <var>&lt;box&gt;</var> ]*
+      <td><var>&lt;box&gt;</var>#
     <tr>
       <th>Initial:
       <td>border-box
@@ -932,8 +930,7 @@ <h3 id="the-background-origin">Positioning Area: the 'background-origin' propert
       <td><dfn>background-origin</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;box&gt;</var>
-        [ , <var>&lt;box&gt;</var> ]*
+      <td><var>&lt;box&gt;</var>#
     <tr>
       <th>Initial:
       <td>padding-box
@@ -1003,7 +1000,7 @@ <h3 id="the-background-size">Sizing Images: the 'background-size' property</h3>
       <td><dfn>background-size</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td><var>&lt;bg-size&gt;</var> [ , <var>&lt;bg-size&gt;</var> ]*
+      <td><var>&lt;bg-size&gt;</var>#
     <tr>
       <th>Initial:
       <td>auto
@@ -1219,7 +1216,7 @@ <h3 id="the-background">Backgrounds Shorthand: the 'background' property</h3>
       <td><dfn id="background">background</dfn>
     <tr>
       <th><a href="#values">Value</a>:
-      <td>[ <var>&lt;bg-layer&gt;</var> , ]* <var>&lt;final-bg-layer&gt;</var>
+      <td><var>&lt;bg-layer&gt;</var># , <var>&lt;final-bg-layer&gt;</var>
     <tr>
       <th>Initial:
       <td>see individual properties
@@ -2797,7 +2794,7 @@ <h3 id="the-box-shadow">Drop Shadows: the 'box-shadow' property</h3>
     <td><dfn>box-shadow</dfn>
   <tr>
     <th><a href="#values">Value</a>:
-    <td>none | <var>&lt;shadow&gt;</var> [ , <var>&lt;shadow&gt;</var> ]*
+    <td>none | <var>&lt;shadow&gt;</var>#
   <tr>
     <th>Initial:
     <td>none