diff --git a/src/calibre/gui2/dialogs/quickview.py b/src/calibre/gui2/dialogs/quickview.py
index ba5efa7427..c72c65af2d 100644
--- a/src/calibre/gui2/dialogs/quickview.py
+++ b/src/calibre/gui2/dialogs/quickview.py
@@ -274,7 +274,7 @@ class Quickview(QDialog, Ui_Quickview):
         index = self.books_table.indexAt(point)
         item = self.books_table.item(index.row(), 0)
         if item is None:
-            return False;
+            return False
         book_id = int(item.data(Qt.UserRole))
         self.context_menu = QMenu(self)
         self.context_menu.addAction(self.view_icon, _('View'),
@@ -425,8 +425,7 @@ class Quickview(QDialog, Ui_Quickview):
 
         try:
             self.current_column = (
-                self.view.column_map.index('authors') if
-                    self.current_column is None and self.view.column_map[idx.column()] == 'title'
+                self.view.column_map.index('authors') if self.current_column is None and self.view.column_map[idx.column()] == 'title'
                 else idx.column())
             key = self.view.column_map[self.current_column]
             book_id = self.view.model().id(idx.row())
diff --git a/src/calibre/gui2/preferences/coloring.py b/src/calibre/gui2/preferences/coloring.py
index 6656542c61..162070d051 100644
--- a/src/calibre/gui2/preferences/coloring.py
+++ b/src/calibre/gui2/preferences/coloring.py
@@ -210,7 +210,7 @@ class ConditionEditor(QWidget):  # {{{
             if dt == 'bool':
                 from calibre.gui2.ui import get_gui
                 if not get_gui().current_db.prefs.get('bools_are_tristate'):
-                        dt = 'bool2'
+                    dt = 'bool2'
             if dt in self.action_map:
                 actions = self.action_map[dt]
             else:
diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index 072c332f88..fdd969a918 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -1602,6 +1602,7 @@ class BuiltinAuthorSorts(BuiltinFormatterFunction):
         names = [sort_data.get(n) for n in mi.authors if n.strip()]
         return val_sep.join(n for n in names)
 
+
 class BuiltinCheckYesNo(BuiltinFormatterFunction):
     name = 'check_yes_no'
     arg_count = 4
@@ -1633,6 +1634,7 @@ class BuiltinCheckYesNo(BuiltinFormatterFunction):
             return 'yes'
         return ""
 
+
 _formatter_builtins = [
     BuiltinAdd(), BuiltinAnd(), BuiltinApproximateFormats(), BuiltinAssign(),
     BuiltinAuthorLinks(), BuiltinAuthorSorts(), BuiltinBooksize(),