Revert "style changes"

This reverts commit 1d4826937e.

actionmailer/lib/rails/generators/mailer/USAGE

@@ -1,12 +1,12 @@
-<b>Description:</b>
+*Description:*
     Stubs out a new mailer and its views. Pass the mailer name, either
     CamelCased or under_scored, and an optional list of emails as arguments.
 
     This generates a mailer class in app/mailers and invokes your template
     engine and test framework generators.
 
-<b>Example:</b>
-    rails generate mailer Notifications signup forgot_password invoice
+*Example:*
+    -rails generate mailer Notifications signup forgot_password invoice-
 
     creates a Notifications mailer class, views, test, and fixtures:
         Mailer:     app/mailers/notifications.rb