added missing 'be'

pydoit · Jul 21, 2019 · 8517665 · 8517665
1 parent f103784
commit 8517665
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/doit/control.py b/doit/control.py
@@ -57,7 +57,7 @@ def __init__(self, task_list, auto_delayed_regex=False):
         for task in task_list:
             # task must be a Task
             if not isinstance(task, Task):
-                msg = "Task must an instance of Task class. %s"
+                msg = "Task must be an instance of Task class. %s"
                 raise InvalidTask(msg % (task.__class__))
             # task name must be unique
             if task.name in self.tasks: