Apply pyupgrade changes

qt/app.py

@@ -442,6 +442,6 @@ class DupeGuru(QObject):
     def select_dest_file(self, prompt, extension):
         files = tr("{} file (*.{})").format(extension.upper(), extension)
         destination, chosen_filter = QFileDialog.getSaveFileName(self.resultWindow, prompt, "", files)
-        if not destination.endswith(".{}".format(extension)):
-            destination = "{}.{}".format(destination, extension)
+        if not destination.endswith(f".{extension}"):
+            destination = f"{destination}.{extension}"
         return destination

qt/directories_dialog.py

@@ -347,7 +347,7 @@ class DirectoriesDialog(QMainWindow):
         destination, chosen_filter = QFileDialog.getSaveFileName(self, title, "", files)
         if destination:
             if not destination.endswith(".dupegurudirs"):
-                destination = "{}.dupegurudirs".format(destination)
+                destination = f"{destination}.dupegurudirs"
             self.app.model.save_directories_as(destination)
 
     def scanButtonClicked(self):

qt/pe/photo.py

@@ -22,7 +22,7 @@ class File(PhotoBase):
                 return (size.width(), size.height())
             else:
                 return (0, 0)
-        except EnvironmentError:
+        except OSError:
             logging.warning("Could not read image '%s'", str(self.path))
             return (0, 0)
 

qt/result_window.py

@@ -470,7 +470,7 @@ class ResultWindow(QMainWindow):
         destination, chosen_filter = QFileDialog.getSaveFileName(self, title, "", files)
         if destination:
             if not destination.endswith(".dupeguru"):
-                destination = "{}.dupeguru".format(destination)
+                destination = f"{destination}.dupeguru"
             self.app.model.save_as(destination)
             self.app.recentResults.insertItem(destination)