GH-81: Clarify scope of reifier of an annotation block

Author: afs

spec/index.html

@@ -946,7 +946,7 @@ <h2>Annotation Syntax</h2>
         If not followed by an annotation block, a <a>reifier</a>
         is treated like a <a href="#grammar-production-reifiedTriple"><code>reifiedTriple</code></a>
         without annotations.
-        If an annotation block is not preceded by a <a>reifier</a>,
+        If an annotation block is not immediately preceded by a <a>reifier</a>,
         an RDF blank node is allocated to serve as the <a>reifier</a> of the
         <a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>.
       </p>