Merge branch 'cherry-pick-9e1955e9-master' into 'master'

Sweeping !30354 from 21.0 to master.
Add fit function results to output root file of tile_sf.C

See merge request !30498

TileCalorimeter/TileExample/TileSimEx/share/tile_sf.C

@@ -93,6 +93,7 @@ void Make_plots(TString infile_hit, TString infile_truth, TString outfile, bool
     
     if (dofit) {
         hp_totalEvsZ->Fit("thefun","","",-15.,15.);
+        HistArray.Add(thefun);
     }
     
     cout << "file name " << infile_hit << endl;