Rename Notifier to UserMailer It's a convention in rails to name your mailers with a Mailer suffix, and is also common to name the class after the recipient (e.g. User, Admin). So UserMailer seems a reasonable choice.
erblint: fix remaining single quoted strings
Whitespace fixes for notifier erb views
Move all settings to settings.yml We leave the STATUS setting alone, since it's required before rails boots. The test-specific settings now live in config/settings/test.yml
Use lazy translations where possible
A better way to contrain the width of the message box whilst also allowing it to shrink on narrow displays Setting a hard "width" it very compatible, but won't squeeze on narrow screens. Setting max-width works well, except in Outlook and Hotmail. We resort to old skool table tricks: a table with width=100%, with 3 columns, only oneof which, the middle one, had content, and a fixed with. This works.