[PyROOT] Show fall-back to __repr__ in __str__ in tutorial
[PyROOT] Show fall-back to __repr__ in __str__ in tutorial

root-mirror/root,karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,root-mirror/root,karies/root,karies/root,olifre/root,olifre/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,karies/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,karies/root,karies/root,olifre/root,olifre/root,olifre/root,olifre/root