keep_style_attr:true is correct.
add_to_keep_html_attrs:,style is an equivalent option.
If you're getting bad section names errors, that's probably unrelated to your
keep_style_attr:true.
adapter_twiwritenet was removed (April 2015), so it's section is invalid and can be removed.
There's only one supported site with a name like 'coffee' and [
www.scarvesandcoffee.net] works fine for me.