Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

print-diagnostic-options.c
// Test that -print-diagnostic-options prints warning groups and disablers

// RUN: %clang -print-diagnostic-options | FileCheck %s

// CHECK:  -W
// CHECK:  -Wno-
// CHECK:  -W#pragma-messages
// CHECK:  -Wno-#pragma-messages
// CHECK:  -W#warnings
// CHECK:  -Wabi
// CHECK:  -Wno-abi
// CHECK:  -Wall
// CHECK:  -Wno-all