doc comment

src/stock_str.rs

@@ -1243,6 +1243,10 @@ pub(crate) async fn aeap_explanation_and_link(
         .replace2(new_addr)
 }
 
+/// Text to put in the [`Qr::Backup`] rendered SVG image.
+///
+/// The default is "Scan to set up second device for <account name (account addr)>".  The
+/// account name and address are looked up from the context.
 pub(crate) async fn backup_transfer_qr(context: &Context) -> Result<String> {
     let contact = Contact::get_by_id(context, ContactId::SELF).await?;
     let addr = contact.get_addr();