Fnhelp

adding help to a function

My pattern for how to show help of a function:

aws_vpcs_cidr() {
    local help=$(cat <<HELP
## aws_vpcs_cidr

List cidr blocks for vpcs in current account

Eg.

...shell
aws_vpcs_cidr
...

HELP
          )
    [[ "${1}" =~ "-help"$ ]] && libsh__help_doc "$help" && return 0