replace equality None check with identity None check

Author: hduelme

files/usr/bin/cinnamon-hover-click

@@ -70,7 +70,7 @@ class HoverClickWindow(XApp.GtkWindow):
             button.connect("toggled", self.action_changed, action)
             button.connect("button-press-event", self.on_button_press_event)
 
-            if self.last_button != None:
+            if self.last_button is not None:
                 button.join_group(self.last_button)
             else:
                 self.last_button = button
@@ -88,7 +88,7 @@ class HoverClickWindow(XApp.GtkWindow):
         self.right_click_button = make_button(_("Secondary Click"), "cinnamon-hc-right-click", "secondary")
         self.button_box.pack_start(self.right_click_button, True, True, 0)
 
-        if self.start_button != None:
+        if self.start_button is not None:
             self.start_button.set_active(True)
 
         self.update_layout()

files/usr/bin/cinnamon-spice-updater

@@ -53,7 +53,7 @@ class UpdateSpices:
             self.updater.upgrade(update)
 
     def update_spice_of_type(self, spice_type):
-        if spice_type == None:
+        if spice_type is None:
             return
 
         self.updater.refresh_cache_for_type(spice_type)
@@ -69,7 +69,7 @@ class UpdateSpices:
             self.updater.upgrade(update)
 
     def list_simple(self, spice_type):
-        if spice_type == None:
+        if spice_type is None:
             return
 
         self.updater.refresh_cache_for_type(spice_type)
@@ -79,7 +79,7 @@ class UpdateSpices:
             print(update.uuid)
 
     def list_json(self, spice_type):
-        if spice_type == None:
+        if spice_type is None:
             return
 
         self.updater.refresh_cache_for_type(spice_type)