Update pydoc for container.execute
Update the pydoc for container's execute method to clarify the return
value.
@@ -382,7 +382,7 @@ class Container(model.Model):
message recived via stderr
:type stderr_handler: Callable[[str], None]
:raises ValueError: if the ws4py library is not installed.
- :returns: The return value, stdout and stdin
+ :returns: A tuple of `(exit_code, stdout, stderr)`
:rtype: _ContainerExecuteResult() namedtuple
"""
if not _ws4py_installed:
