diff --git a/src/calibre/devices/kobo/driver.py b/src/calibre/devices/kobo/driver.py
index 09871c0f54..77b466c8b2 100644
--- a/src/calibre/devices/kobo/driver.py
+++ b/src/calibre/devices/kobo/driver.py
@@ -1723,7 +1723,7 @@ class KOBOTOUCH(KOBO):
                          expiry="" if self.show_archived_books else "and IsDownloaded in ('true', 1)",
                          previews=" OR (Accessibility in (6) AND ___UserID <> '')" if self.show_previews else "",
                          recomendations=" OR (Accessibility IN (-1, 4, 6) AND ___UserId = '')" if self.show_recommendations else "",
-                         downloaded_accessibility = "1,2,9" if  self.supports_overdrive() else "1,2"
+                         downloaded_accessibility="1,2,9" if self.supports_overdrive() else "1,2"
                          )
             elif self.supports_series():
                 where_clause = (" WHERE BookID IS NULL "
diff --git a/src/calibre/gui2/dialogs/metadata_bulk.py b/src/calibre/gui2/dialogs/metadata_bulk.py
index 97305cdcff..2ca4b24da4 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.py
+++ b/src/calibre/gui2/dialogs/metadata_bulk.py
@@ -757,7 +757,7 @@ class MetadataBulkDialog(QDialog, Ui_MetadataBulkDialog):
             try:
                 v = int(val[0])
                 if v < 0 or v > 10:
-                    ok = False;
+                    ok = False
             except:
                 ok = False
             if not ok:
diff --git a/src/calibre/gui2/preferences/columns.py b/src/calibre/gui2/preferences/columns.py
index 88658b3334..519d1ba588 100644
--- a/src/calibre/gui2/preferences/columns.py
+++ b/src/calibre/gui2/preferences/columns.py
@@ -91,7 +91,6 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         for row, col in enumerate(colmap):
             self.setup_row(self.field_metadata, row, col)
 
-
         self.restore_geometry()
         self.opt_columns.cellDoubleClicked.connect(self.row_double_clicked)
         self.opt_columns.blockSignals(False)