anchor.diff:    D: TATTabData;
     F: TEditorFrame;
     isOem, bSilent,
  -  bPreviewTab, bEnableHistory, bNoEvent: boolean;
  +  bPreviewTab, bEnableHistory, bEnableEvent: boolean;
     tick: QWord;
     msg: string;
     i: integer;
  
positive.code: 
    bPreviewTab:= Pos('/preview', AOptions)>0;
    bEnableHistory:= Pos('/nohistory', AOptions)=0;
    bNoEvent:= Pos('/noevent', AOptions)>0;
  
    if APages=nil then
      APages:= Groups.PagesCurrent;
  
negative.code:   end;
  
    //py event
    if bEnableEvent then
      if DoPyEvent(CurrentEditor, cEventOnOpenBefore,
        [SStringToPythonString(AFilename)]) = cPyFalse then exit;
  
  