Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
## Error for an unknown output style. RUN: not llvm-readobj --elf-output-style=unknown 2>&1 | FileCheck %s CHECK: error: --elf-output-style value should be either 'LLVM', 'GNU', or 'JSON', but was 'unknown'