[skip-ci] Adjust list items in TList.cxx (#6495)
[skip-ci] Adjust list items in TList.cxx (#6495)

The list of suggestions for iterating over a TList starts at item zero. This item is currently not part of the list as doxygen considers it a continuation of the previous sentence. Even bringing it to a new line doesn't work since it gets indented separately from the other items (a few spaces before). I propose adjusting the numbers of the items to make the list start from one. This way doxygen renders the list correctly.
root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,root-mirror/root