[#3770] Addressed comments

src/lib/dhcp/classify.h

@@ -256,7 +256,7 @@ public:
         /// @brief A hashing operator.
         ///
         /// @param client_classes ClientClasses instance to be hashed.
-        /// \return a hashing result.
+        /// @return a hashing result.
         size_t operator()(const ClientClasses& client_classes);
     };
 

src/lib/dhcpsrv/cfg_option.h

@@ -342,7 +342,6 @@ typedef boost::multi_index_container<
                                            ClientClasses,
                                            &OptionDescriptor::client_classes_>
             >
-
         >
     >
 > OptionContainer;