Clarify that a sentence applies to fragment "$id"s

handrews · handrews · commit f563f1c5ff6b · 2017-08-20T19:33:41.000-07:00
This addresses the trivial portion of issue #349.
diff --git a/jsonschema-core.xml b/jsonschema-core.xml
@@ -468,8 +468,9 @@
                     Pointer references are updated.
                 </t>
                 <t>
-                    The effect of defining an "$id" that neither matches the above
-                    requirements nor is a valid JSON pointer is not defined.
+                    The effect of defining a URI fragment "$id" that neither
+                    matches the above requirements nor is a valid JSON pointer
+                    is not defined.
                 </t>
                 <t>
                     For example:
