Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
a bc // RUN: echo "[{\"file\": \"%/s\", \"offset\": 1, \"remove\": 2, }]" > %t.remap // RUN: c-arcmt-test %t.remap | arcmt-test -verify-transformed-files %s.result