[css2] spell fix

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%401828

Author: ianbjacobs

css2/generate.src

@@ -397,7 +397,7 @@ quotations. Values have the following meanings:</p>
 <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.
+produce no quotation 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