Replace tabs in a Stack.cxx comment

Author: sawenzel

Detectors/Base/src/Stack.cxx

@@ -193,8 +193,8 @@ void Stack::PushTrack(Int_t toBeDone, Int_t parentId, Int_t pdgCode, Double_t px
                       TMCProcess proc2)
 {
   //  printf("Pushing %s toBeDone %5d parentId %5d pdgCode %5d is %5d entries %5d \n",
-  //	 proc == kPPrimary ? "Primary:   " : "Secondary: ",
-  //	 toBeDone, parentId, pdgCode, is, mNumberOfEntriesInParticles);
+  //   proc == kPPrimary ? "Primary:   " : "Secondary: ",
+  //   toBeDone, parentId, pdgCode, is, mNumberOfEntriesInParticles);
 
   //
   // This method is called