another wording tweak

Author: John Daggett

css3-fonts/Fonts.html

@@ -4416,16 +4416,14 @@ <h3 id=font-feature-settings-prop><span class=secno>6.12 </span>Low-level
   <pre
    class=prod><dfn id=ltfeature-tag-valuegt><var>&lt;feature-tag-value&gt;</var></dfn> = &lt;string&gt; [ &lt;integer&gt; | on | off ]?</pre>
 
-  <p>The &lt;string&gt; is a case-sensitive OpenType feature tag. For it to
-   match an OpenType feature contained in a font, it must follow the syntax
-   rules for these tags. As specified in the OpenType specification, feature
-   tags contain four ASCII characters. Tag strings longer or shorter than
-   four characters, or containing characters outside the U+20-7E codepoint
-   range are invalid. User agents must not use a feature tag created by
-   truncating or padding the string to four characters. Feature tags need
-   only match a feature tag defined in the font, they are not limited to
-   explicitly registered OpenType features. Fonts defining custom feature
-   tags should follow the <a
+  <p>The &lt;string&gt; is a case-sensitive OpenType feature tag. As
+   specified in the OpenType specification, feature tags contain four ASCII
+   characters. Tag strings longer or shorter than four characters, or
+   containing characters outside the U+20-7E codepoint range are invalid.
+   User agents must not use a feature tag created by truncating or padding
+   the string to four characters. Feature tags need only match a feature tag
+   defined in the font, they are not limited to explicitly registered
+   OpenType features. Fonts defining custom feature tags should follow the <a
    href="http://www.microsoft.com/typography/otspec/featuretags.htm">tag name
    rules</a> defined in the OpenType specification <a
    href="#OPENTYPE-FEATURES"