doubleQuote: true Not Working on Partials

[beefchimi]

I have a single page site. My index.html is compiled from main.html.haml which is my site template. Within this file, I include several partials like so:

= Haml::Engine.new(File.read('dev/haml/_head.html.haml')).render

When I run:

gulp.task('haml', function() {
    gulp.src(paths.haml.src + 'main.html.haml')
        .pipe(plugins.rubyHaml({doubleQuote: true}))
        .pipe(plugins.rename('index.html'))
        .pipe(gulp.dest('./'));
});

I get an index.html file where only the attributes within main.html.haml are converted to double quotes. All the attributes from the partials remain as single quotes.

Is this expected behaviour? If so, how would I change my task to apply double quotes to partials as well as the main template?

Thanks!