WIthout the html safe if you use markerb in a partial you have to wrap it with raw.
Output html safe so can use in partials w/o raw.
@mpetnuch thanks for the patch! Can you provide a simple test for this? You can tweak the mailer in markerb_test.rb and setup the views and partials in test/views and might be good to go.
add spec for partial rendering
closes #1 #8
@josevalim you can close this as #9 was merged.