Fix documentation related to missing BaseTask class

The docs no longer matched reality.

Change-Id: I9ee98e16fc03489569bbed8355416a73f7bc02ff
Closes-Bug: 1579890

doc/source/arguments_and_results.rst

@@ -2,12 +2,12 @@
 Arguments and results
 =====================
 
-.. |task.execute| replace:: :py:meth:`~taskflow.task.BaseTask.execute`
-.. |task.revert| replace:: :py:meth:`~taskflow.task.BaseTask.revert`
+.. |task.execute| replace:: :py:meth:`~taskflow.atom.Atom.execute`
+.. |task.revert| replace:: :py:meth:`~taskflow.atom.Atom.revert`
 .. |retry.execute| replace:: :py:meth:`~taskflow.retry.Retry.execute`
 .. |retry.revert| replace:: :py:meth:`~taskflow.retry.Retry.revert`
 .. |Retry| replace:: :py:class:`~taskflow.retry.Retry`
-.. |Task| replace:: :py:class:`Task <taskflow.task.BaseTask>`
+.. |Task| replace:: :py:class:`Task <taskflow.task.Task>`
 
 In TaskFlow, all flow and task state goes to (potentially persistent) storage
 (see :doc:`persistence <persistence>` for more details). That includes all the

doc/source/atoms.rst

@@ -23,10 +23,10 @@ values (requirements) and name outputs (provided values).
 Task
 =====
 
-A :py:class:`task <taskflow.task.BaseTask>` (derived from an atom) is a
+A :py:class:`task <taskflow.task.Task>` (derived from an atom) is a
 unit of work that can have an execute & rollback sequence associated with
-it (they are *nearly* analogous to functions). These task objects all derive
-from :py:class:`~taskflow.task.BaseTask` which defines what a task must
+it (they are *nearly* analogous to functions). Your task objects should all
+derive from :py:class:`~taskflow.task.Task` which defines what a task must
 provide in terms of properties and methods.
 
 **For example:**

doc/source/inputs_and_outputs.rst

@@ -62,7 +62,7 @@ task.
 .. note::
 
    There is no difference between processing of
-   :py:class:`Task <taskflow.task.BaseTask>` and
+   :py:class:`Task <taskflow.task.Task>` and
    :py:class:`~taskflow.retry.Retry` inputs and outputs.
 
 ------------------

doc/source/states.rst

@@ -132,30 +132,30 @@ the ``IGNORE`` state.
 
 **RUNNING** - When an engine running the task starts to execute the task, the
 engine will transition the task to the ``RUNNING`` state, and the task will
-stay in this state until the tasks :py:meth:`~taskflow.task.BaseTask.execute`
+stay in this state until the tasks :py:meth:`~taskflow.atom.Atom.execute`
 method returns.
 
 **SUCCESS** - The engine running the task transitions the task to this state
 after the task has finished successfully (ie no exception/s were raised during
-running its :py:meth:`~taskflow.task.BaseTask.execute` method).
+running its :py:meth:`~taskflow.atom.Atom.execute` method).
 
 **FAILURE** - The engine running the task transitions the task to this state
 after it has finished with an error (ie exception/s were raised during
-running its :py:meth:`~taskflow.task.BaseTask.execute` method).
+running its :py:meth:`~taskflow.atom.Atom.execute` method).
 
 **REVERT_FAILURE** - The engine running the task transitions the task to this
 state after it has finished with an error (ie exception/s were raised during
-running its :py:meth:`~taskflow.task.BaseTask.revert` method).
+running its :py:meth:`~taskflow.atom.Atom.revert` method).
 
 **REVERTING** - The engine running a task transitions the task to this state
 when the containing flow the engine is running starts to revert and
-its :py:meth:`~taskflow.task.BaseTask.revert` method is called. Only tasks in
+its :py:meth:`~taskflow.atom.Atom.revert` method is called. Only tasks in
 the ``SUCCESS`` or ``FAILURE`` state can be reverted.  If this method fails (ie
 raises an exception), the task goes to the ``REVERT_FAILURE`` state.
 
 **REVERTED** - The engine running the task transitions the task to this state
 after it has successfully reverted the task (ie no exception/s were raised
-during running its :py:meth:`~taskflow.task.BaseTask.revert` method).
+during running its :py:meth:`~taskflow.atom.Atom.revert` method).
 
 Retry
 =====

taskflow/persistence/models.py

@@ -704,7 +704,7 @@ class AtomDetail(object):
 class TaskDetail(AtomDetail):
     """A task detail (an atom detail typically associated with a |tt| atom).
 
-    .. |tt| replace:: :py:class:`~taskflow.task.BaseTask`
+    .. |tt| replace:: :py:class:`~taskflow.task.Task`
     """
 
     def reset(self, state):