Print todo identifiers with delete or do subcommands.

When the linenumber based todos are used, you still risk the wrong
ID is printed. But now you can used a UID to reduce the chance
significantly.

test/DeleteCommandTest.py

@@ -78,7 +78,7 @@ class DeleteCommandTest(CommandTest.CommandTest):
 
         self.assertTrue(self.todolist.is_dirty())
         self.assertEquals(self.todolist.todo(1).source(), "Foo")
-        self.assertEquals(self.output, "Removed: Bar p:1\nThe following todo item(s) became active:\nFoo\n")
+        self.assertEquals(self.output, "Removed: Bar p:1\nThe following todo item(s) became active:\n|  1| Foo\n")
         self.assertEquals(self.errors, "")
 
     def test_del7(self):

test/DoCommandTest.py

@@ -167,7 +167,7 @@ class DoCommandTest(CommandTest.CommandTest):
         command = DoCommand.DoCommand(["3"], self.todolist, self.out, self.error)
         command.execute()
 
-        self.assertEquals(self.output, first_output + "Completed: x %s Baz p:1\nThe following todo item(s) became active:\nFoo id:1\n" % self.today)
+        self.assertEquals(self.output, first_output + "Completed: x %s Baz p:1\nThe following todo item(s) became active:\n|  1| Foo id:1\n" % self.today)
         self.assertEquals(self.errors, "")
 
     def test_activated_todos2(self):

topydo/lib/DCommand.py

@@ -63,12 +63,8 @@ class DCommand(Command):
     def _uncompleted_children(self, p_todo):
         return sorted([t for t in self.todolist.children(p_todo) if not t.is_completed()])
 
-    def _print_list(self, p_todos, p_print_numbers=True):
-        filters = []
-
-        if p_print_numbers:
+    def _print_list(self, p_todos):
         filters = [self.todolist.pp_number()]
-
         self.out("\n".join(pretty_print_list(p_todos, filters)))
 
     def prompt_text(self):
@@ -95,7 +91,7 @@ class DCommand(Command):
         delta = [todo for todo in p_new if todo not in p_old]
         if delta:
             self.out("The following todo item(s) became active:")
-            self._print_list(delta, False)
+            self._print_list(delta)
 
     def _active_todos(self):
         """