fphilipe/premailer-rails3 — pull request #38 by GAV1N (2012-05-23 00:56:27+00:00)
Title: Delete existing html part without inline CSS before adding html part with CSS inline

When the message already has an HTML part, the PremailerRails::Hook class adds the new HTML part to the message, resulting in duplicate HTML parts. I think the original HTML part (with non-inlined CSS) should be deleted first.