PDFBOX-5660: remove unneeded cast, improve javadoc

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1928952 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/multipdf/PDFCloneUtility.java

@@ -74,6 +74,7 @@ PDDocument getDestination()
      * 
      * Expert use only, don’t use it if you don’t know exactly what you are doing.
      * 
+     * @param <TCOSBase> The type to be returned.
      * @param base the initial object as the root of the deep-clone operation
      * @return the cloned instance of the base object
      * @throws IOException if an I/O error occurs

pdfbox/src/test/java/org/apache/pdfbox/multipdf/PDFCloneUtilityTest.java

@@ -63,7 +63,7 @@ void testClonePDFWithCosArrayStream() throws IOException
             new PDPageContentStream(srcDoc, pdPage, AppendMode.APPEND, true).close();
             PDFCloneUtility cloner = new PDFCloneUtility(dstDoc);
             assertEquals(dstDoc, cloner.getDestination());
-            COSDictionary clonedPageDictionary = (COSDictionary) cloner.cloneForNewDocument(pdPage.getCOSObject());
+            COSDictionary clonedPageDictionary = cloner.cloneForNewDocument(pdPage.getCOSObject());
             PDPage clonedPage = new PDPage(clonedPageDictionary);
             Iterator<PDStream> contentStreams = clonedPage.getContentStreams();
             assertNotNull(contentStreams.next());