Merge pull request #606 from handrews/comment-not-annot

Clarify $comment and annotations

Author: handrews

jsonschema-core.xml

@@ -1098,7 +1098,8 @@
                 schemas is a concern.
 
                 Implementations MUST NOT take any other action based on the presence, absence,
-                or contents of "$comment" properties.
+                or contents of "$comment" properties.  In particular, the value of "$comment"
+                MUST NOT be collected as an annotation result.
             </t>
         </section>