Email Titles can contain escaped HTML Entities

[mattyrob]

Emails sent with backup files attached use a standard subject (currently from line 1084 of the code):
get_bloginfo( 'name' ) . ' ' . __( 'Database Backup', 'wp-db-backup' )

The get_bloginfo() call is essentially a wrapper for get_option( 'blogname' ) and therefore any HTML entities will be encoded when returned from the database.

For display on a webpage this make no difference as the browser will display the same output to the user, but in an Email characters like ampersands will remain encoded as & rather than displaying as &.

A possible fix for this is to pass the email subject variable through html_entity_decode().