Remove meaningless or redundant (implied) todos.

include/boost/hana/detail/sandbox/monad_zero.hpp

@@ -42,7 +42,7 @@ namespace boost { namespace hana {
     //! @method{MonadZero}
     //!
     //! ### Example
-    //! @todo
+    //! ...
     BOOST_HANA_CONSTEXPR_LAMBDA auto filter = [](auto predicate, auto monad) {
         return MonadZero::instance<datatype_t<decltype(monad)>>::filter_impl(predicate, monad);
     };

include/boost/hana/integer_list.hpp

@@ -24,9 +24,6 @@ namespace boost { namespace hana {
     //! @note
     //! `IntegerList` may be more efficient than `List` because of
     //! optimizations. When possible, it should be preferred.
-    //!
-    //! @todo
-    //! Actually provide optimizations.
     struct IntegerList { };
 
     namespace operators {

include/boost/hana/type_list.hpp

@@ -27,8 +27,7 @@ namespace boost { namespace hana {
     //! optimizations. When possible, it should be preferred.
     //!
     //! @todo
-    //! - Implement efficient membership testing.
-    //! - Actually provide optimizations.
+    //! - Efficient membership testing is possible.
     //! - `TypeList` is not really a `Functor` because the function must
     //!   map from `Type`s to `Type`s. Should it be modified so that
     //!   `TypeList` becomes `List` if we try to store something else

test/sandbox/string.cpp

@@ -157,7 +157,7 @@ namespace boost { namespace hana { namespace sandbox {
         //////////////////////////////////////////////////////////////////////
         // operations
         //////////////////////////////////////////////////////////////////////
-        // TODO
+        // ...
 
     private:
         //////////////////////////////////////////////////////////////////////