use string.format instead of old style (%) formatting

gui/kivy/main_window.py

@@ -631,7 +631,7 @@ class ElectrumWindow(App):
             if not self.wallet.up_to_date or server_height == 0:
                 status = _("Synchronizing...")
             elif server_lag > 1:
-                status = _("Server lagging (%d blocks)"%server_lag)
+                status = _("Server lagging ({} blocks)").format(server_lag)
             else:
                 c, u, x = self.wallet.get_balance()
                 text = self.format_amount(c+x+u)
@@ -846,7 +846,7 @@ class ElectrumWindow(App):
     def _delete_wallet(self, b):
         if b:
             basename = os.path.basename(self.wallet.storage.path)
-            self.protected(_("Enter your PIN code to confirm deletion of %s") % basename, self.__delete_wallet, ())
+            self.protected(_("Enter your PIN code to confirm deletion of {}").format(basename), self.__delete_wallet, ())
 
     def __delete_wallet(self, pw):
         wallet_path = self.get_wallet_path()

gui/kivy/uix/dialogs/installwizard.py

@@ -135,7 +135,7 @@ Builder.load_string('''
         height: self.minimum_height
         Label:
             color: root.text_color
-            text: _('From %d cosigners')%n.value
+            text: _('From {} cosigners').format(n.value)
         Slider:
             id: n
             range: 2, 5
@@ -143,7 +143,7 @@ Builder.load_string('''
             value: 2
         Label:
             color: root.text_color
-            text: _('Require %d signatures')%m.value
+            text: _('Require {} signatures').format(m.value)
         Slider:
             id: m
             range: 1, n.value

gui/kivy/uix/dialogs/tx_dialog.py

@@ -112,7 +112,7 @@ class TxDialog(Factory.Popup):
         if timestamp:
             self.date_str = datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
         elif exp_n:
-            self.date_str = _('Within %d blocks') % exp_n if exp_n > 0 else _('unknown (low fee)')
+            self.date_str = _('Within {} blocks').format(exp_n) if exp_n > 0 else _('unknown (low fee)')
         else:
             self.date_str = ''
 

gui/kivy/uix/ui_screens/network.kv

@@ -11,7 +11,7 @@ Popup:
                 height: self.minimum_height
                 padding: '10dp'
                 SettingsItem:
-                    value: _("%d connections.")% app.num_nodes if app.num_nodes else _("Not connected")
+                    value: _("{} connections.").format(app.num_nodes) if app.num_nodes else _("Not connected")
                     title: _("Status") + ': ' + self.value
                     description: _("Connections with Electrum servers")
                     action: lambda x: None
@@ -46,7 +46,7 @@ Popup:
 
                 CardSeparator
                 SettingsItem:
-                    title: _('Fork detected at block %d')%app.blockchain_checkpoint if app.num_chains>1 else _('No fork detected')
+                    title: _('Fork detected at block {}').format(app.blockchain_checkpoint) if app.num_chains>1 else _('No fork detected')
                     fork_description: (_('You are following branch') if app.auto_connect else _("Your server is on branch")) + ' ' + app.blockchain_name
                     description: self.fork_description if app.num_chains>1 else _('Connected nodes are on the same chain')
                     action: app.choose_blockchain_dialog