Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

on_the_fly_arg_change.test
# RUN: cp -f %S/Inputs/on_the_fly_arg_change.c %t.c
# RUN: %update_cc_test_checks %t.c
# RUN: diff -u %t.c %S/Inputs/on_the_fly_arg_change.c.expected
## Check that running the script again does not change the result:
# RUN: %update_cc_test_checks %t.c
# RUN: diff -u %t.c %S/Inputs/on_the_fly_arg_change.c.expected