minor javadoc fixes

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/dataformat/xml/deser/FromXmlParser.java

@@ -38,7 +38,7 @@ public enum Feature implements FormatFeature
     {
         /**
          * Feature that indicates whether XML Empty elements (ones where there are
-         * no separate start and end tages, but just one tag that ends with "/>")
+         * no separate start and end tages, but just one tag that ends with "/>")
          * are exposed as {@link JsonToken#VALUE_NULL}) or not. If they are not
          * returned as `null` tokens, they will be returned as {@link JsonToken#VALUE_STRING}
          * tokens with textual value of "" (empty String).

src/main/java/com/fasterxml/jackson/dataformat/xml/ser/XmlSerializerProvider.java

@@ -30,7 +30,7 @@ public class XmlSerializerProvider extends DefaultSerializerProvider
 
     /**
      * If all we get to serialize is a null, there's no way to figure out
-     * expected root name; so let's just default to something like "<null>"...
+     * expected root name; so let's just default to literal {@code "null"}.
      */
     protected final static QName ROOT_NAME_FOR_NULL = new QName("null");