minor fixes

Author: annevk

cssom/Overview.html

@@ -15,6 +15,9 @@
    p.note::before { content:"Note: " }
    .XXX { padding:.5em; border:solid red }
    p.XXX::before { content:"Issue: " }
+   dl.switch { padding-left:2em }
+   dl.switch > dt { text-indent:-1.5em }
+   dl.switch > dt:before { content:'\21AA'; padding:0 0.5em 0 0; display:inline-block; width:1em; text-align:right; line-height:0.5em }
    em.ct { text-transform:lowercase; font-variant:small-caps; font-style:normal }
    code { color:orangered }
    code :link, code :visited { color:inherit }
@@ -775,7 +778,7 @@ <h3 id=serializing-selectors><span class=secno>5.2. </span>Serializing
    let <var title="">s</var> be the empty string, run the steps below, and
    finally return <var title="">s</var>:
 
-  <dl>
+  <dl class=switch>
    <dt>type selector
 
    <dt>universal selector
@@ -869,7 +872,7 @@ <h3 id=serializing-selectors><span class=secno>5.2. </span>Serializing
     <p>Otherwise, append "<code>:</code>" (U+003A), followed by the name of
      the pseudo-class, followed by "<code>(</code>" (U+0028), followed by the
      value of the pseudo-class argument determined as per below, followed by
-     "<code>)</code> (U+0029), to <var title="">s</var>.</p>
+     "<code>)</code>" (U+0029), to <var title="">s</var>.</p>
 
     <dl>
      <dt><code title="">:lang()</code>

cssom/Overview.src.html

@@ -14,6 +14,9 @@
    p.note::before { content:"Note: " }
    .XXX { padding:.5em; border:solid red }
    p.XXX::before { content:"Issue: " }
+   dl.switch { padding-left:2em }
+   dl.switch > dt { text-indent:-1.5em }
+   dl.switch > dt:before { content:'\21AA'; padding:0 0.5em 0 0; display:inline-block; width:1em; text-align:right; line-height:0.5em }
    em.ct { text-transform:lowercase; font-variant:small-caps; font-style:normal }
    code { color:orangered }
    code :link, code :visited { color:inherit }
@@ -540,7 +543,7 @@ <h3>Serializing Selectors</h3>
   let <var title="">s</var> be the empty string, run the steps below, and
   finally return <var title="">s</var>:</p>
 
-  <dl>
+  <dl class="switch">
    <dt>type selector</dt>
    <dt>universal selector</dt>
    <dd>
@@ -623,7 +626,7 @@ <h3>Serializing Selectors</h3>
     <p>Otherwise, append "<code>:</code>" (U+003A), followed by the name of
     the pseudo-class, followed by "<code>(</code>" (U+0028), followed by the
     value of the pseudo-class argument determined as per below, followed by
-    "<code>)</code> (U+0029), to <var title="">s</var>.</p>
+    "<code>)</code>" (U+0029), to <var title="">s</var>.</p>
 
     <dl>
      <dt><code title="">:lang()</code></dt>