Update documentation for Container.execute
@@ -62,8 +62,8 @@ Container methods
- `unfreeze` - Resume the container
- `execute` - Execute a command on the container. The first argument is
a list, in the form of `subprocess.Popen` with each item of the command
- as a separate item in the list. Returns a two part tuple of
- `(stdout, stderr)`. This method will block while the command is executed.
+ as a separate item in the list. Returns a tuple of `(exit_code, stdout, stderr)`.
+ This method will block while the command is executed.
- `migrate` - Migrate the container. The first argument is a client
connection to the destination server. This call is asynchronous, so
`wait=True` is optional. The container on the new client is returned.
