[css2] Added none value to quotes property, other minor changes

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%40939

Author: ianbjacobs

css2/generate.src

@@ -265,12 +265,26 @@ Centaurs: ... have hoofs
 
 <P>So that user agents may handle nested quotation marks in a
 language-dependent way, CSS provides the <span
-class="propinst-quotes">'quotes'</span> property. The value of this
-property is a list of pairs of quotation marks (opening and
+class="propinst-quotes">'quotes'</span> property. Values have
+the following meanings:</p>
+
+<dl>
+<dt><strong>none</strong>
+<dd>The 'open-quote' and 'close-quote' values of the
+<span class="propinst-content">'content'</span> property
+produce no quotations marks.
+<dt>[<span class="index-inst" title="&lt;string&gt;"><span
+class="value-inst-string"><strong>&lt;string&gt;</strong></span></span>
+&nbsp;<span class="index-inst" title="&lt;string&gt;"><span
+class="value-inst-string"><strong>&lt;string&gt;</strong></span></span>]+
+<dd>Values for the 'open-quote' and 'close-quote' values of the
+<span class="propinst-content">'content'</span> property are taken
+from this list of pairs of quotation marks (opening and
 closing). The first (leftmost) pair represents the outermost level of
 quotation, the second pair the first level of embedding, etc. The user
 agent must apply the appropriate pair of quotation marks according to
 the level of embedding.
+</dl>
 
 <P>Applying the following style sheet:</p>