--- a/eric7/EricWidgets/EricTreeWidget.py	Sun May 23 13:33:13 2021 +0200
+++ b/eric7/EricWidgets/EricTreeWidget.py	Sun May 23 15:35:49 2021 +0200
@@ -261,7 +261,8 @@
             self.itemControlClicked.emit(self.itemAt(evt.position().toPoint()))
             return
         elif evt.buttons() == Qt.MouseButton.MiddleButton:
-            self.itemMiddleButtonClicked.emit(self.itemAt(evt.position().toPoint()))
+            self.itemMiddleButtonClicked.emit(
+                self.itemAt(evt.position().toPoint()))
             return
         else:
             super().mousePressEvent(evt)