Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# RUN: yaml-bench -canonical %s "Fun with \\ \" \a \b \e \f \ \n \r \t \v \0 \ \ \_ \N \L \P \ \x41 \u0041 \U00000041" # CHECK: !!str "Fun with \\\n\" \a \b \e \f \n \r \t \v \0 \_ \N \L \P A A A"