From Olivier: - Fix this bug: https://savannah.cern.ch/bugs/index.php?27676   After zooming and unzooming on a plot containning several TF1 drawn with   the option SAME, the functions might be truncated. This problem was   visible with the following macro:
From Olivier:
- Fix this bug: https://savannah.cern.ch/bugs/index.php?27676
  After zooming and unzooming on a plot containning several TF1 drawn with
  the option SAME, the functions might be truncated. This problem was
  visible with the following macro:

  TF1* f[6];
  double fg(double *x, double *p) {return sin((*p)*(*x));}
  void test_zoom() {
    for (int i=0;i<6;++i) {
      f[i]=new TF1(Form("f%d",i),fg, 0,2, 1);
      f[i]->SetParameter(0,i+1);
      f[i]->SetLineColor(i+1);
      f[i]->Draw(i?"same":"");
    }
    f[0]->GetXaxis()->SetRangeUser(.1,.3);
    gPad->Update();
    f[0]->GetXaxis()->UnZoom();
    gPad->Modified();
  }

- Fix coding conventions and remove training blanks.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@19260 27541ba8-7e3a-0410-8455-c3a389f83636

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