Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# Simple uses of '!' # RUN: ! %{python} fail.py # RUN: ! ! %{python} pass.py # RUN: ! ! ! %{python} fail.py # RUN: ! ! ! ! %{python} pass.py # pass.py succeeds but we expect failure # RUN: ! %{python} pass.py