Editorial: change style of preload integrity metadata test

* It previously had a misplaced "; or" and an extra ";"
* Move from !(A || B) to !A && !B for clarity

source

@@ -27686,14 +27686,15 @@ document.body.appendChild(wbr);</code></pre>
    <span data-x="preload integrity metadata">integrity metadata</span>.</p></li>
 
    <li>
-    <p>If none of the following conditions apply:</p>
+    <p>If all of the following are true:</p>
 
     <ul>
-     <li><p><var>consumerIntegrityMetadata</var> is <code data-x="">no metadata</code>;</p></li>
+     <li><p><var>consumerIntegrityMetadata</var> is not <code data-x="">no metadata</code>;
+     and</p></li>
 
      <li>
-      <p><var>consumerIntegrityMetadata</var> is equal to <var>preloadIntegrityMetadata</var>;
-      or</p>
+      <p><var>consumerIntegrityMetadata</var> is not equal to
+      <var>preloadIntegrityMetadata</var></p>
 
       <p class="XXX">This comparison would ignore unknown integrity options. See <a
       href="https://github.com/w3c/webappsec-subresource-integrity/issues/116">issue #116.</a></p>