- Added support for shadow.notify to indicate when the shadow file is updated

- Fixed description validation bug that allowed \n, \r and \f in a description, then rendered the pending.data file unparseable

src/command.cpp

@@ -82,7 +82,7 @@ void handleAdd (TDB& tdb, T& task, Config& conf)
 
   // Disallow blank descriptions.
   if (task.getDescription () == "")
-    throw std::string ("Cannot add a blank task.");
+    throw std::string ("Cannot add a task that is blank, or contains <CR> or <LF> characters.");
 
   if (!tdb.addT (task))
     throw std::string ("Could not create new task.");