bp_email_plaintext_entity_decode( string $retval, string $prop, string $transform )

function bp_email_plaintext_entity_decode( $retval, $prop, $transform ) {
	switch ( $prop ) {
		case 'content_plaintext' :
		case 'subject' :
			// Only decode if 'replace-tokens' is the current type.
			if ( 'replace-tokens' === $transform ) {
				return html_entity_decode( $retval, ENT_QUOTES );
			} else {
				return $retval;
			}
			break;

		default :
			return $retval;
			break;
	}
}