Minor fix.

Author: gkellogg

common/terms.html

@@ -146,7 +146,7 @@
   <dt class="changed"><dfn>id map</dfn></dt><dd class="changed">
     An <a>id map</a> is a <a>dictionary</a> value of a <a>term</a>
     defined with <code>@container</code> set to <code>@id</code>.
-    The values of the <a>id map</a> MUST be a <a>node objects</a>,
+    The values of the <a>id map</a> MUST be <a>node objects</a>,
     and its keys are interpreted as <a>IRIs</a> representing
     the <code>@id</code> of the associated <a>node object</a>.
     If a value in the <a>id map</a> contains a key expanding to <code>@id</code>,