Re: [PATCH v5 1/2] send-email: refactor header generation functions

>> +sub send_message {
>> +	my ($recipients_ref, $to, $date, $gitversion, $cc, $ccline, $header) = gen_header();
>
> This makes the diff smaller, but if we're refactoring these functions to
> return arguments it's probably better to return a hash reference rather
> than remembering all the parameter names.
>
> But in this case it's probably fine...
> ...
>> +sub pre_process_file {
>> +	my ($t, $quiet) = @_;
>
> This, I think, is an anti-pattern in this file. We can just read the
> "$quiet" and other things that we set up when we parse the parameters as
> globals, we don't need to pass them as named parameters.
>
> It doesn't help readability to shadow that variable with another lexical
> here below:
> ...