diff -r ec153828ded2 -r b789b695b5c6 controls/PouInstanceVariablesPanel.py
--- a/controls/PouInstanceVariablesPanel.py	Tue Aug 15 12:17:51 2017 +0300
+++ b/controls/PouInstanceVariablesPanel.py	Tue Aug 15 15:50:30 2017 +0300
@@ -148,7 +148,7 @@
                        getattr(CT, "TR_ALIGN_WINDOWS_RIGHT", CT.TR_ALIGN_WINDOWS))
         self.VariablesList.SetIndent(0)
         self.VariablesList.SetSpacing(5)
-        self.VariablesList.DoSelectItem = lambda *x,**y:True
+        self.VariablesList.DoSelectItem = lambda *x, **y: True
         self.VariablesList.Bind(CT.EVT_TREE_ITEM_ACTIVATED,
                 self.OnVariablesListItemActivated)
         self.VariablesList.Bind(wx.EVT_LEFT_DOWN, self.OnVariablesListLeftDown)