diff -r b112bfdde5cc -r 5b6ad7a7fd9d dialogs/BlockPreviewDialog.py
--- a/dialogs/BlockPreviewDialog.py	Sat Aug 19 21:06:54 2017 +0300
+++ b/dialogs/BlockPreviewDialog.py	Mon Aug 21 21:55:18 2017 +0300
@@ -28,9 +28,9 @@
 from plcopen.structures import TestIdentifier, IEC_KEYWORDS
 from graphics.GraphicCommons import FREEDRAWING_MODE
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                    Dialog with preview for graphic block
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 
 class BlockPreviewDialog(wx.Dialog):