Minor workaround in doxygen_basic_translate_style3 test

With the "///" doxygen comment style, comments within a code block do
not get handled correctly.  Modifying the test to remove this case and
adding a note about it for future reference.

Examples/test-suite/java/doxygen_basic_translate_style3_runme.java

@@ -55,7 +55,7 @@ public class doxygen_basic_translate_style3_runme {
     		" {@code \n" +
     		"int main() { while(true); } \n" +
 		"\n" +
-		"// Test blank line in code block \n" +
+		"int testBlankLine() {} \n" +
     		" }\n" +
     		" }\n" +
     		" \n" +