### Check duplicate issues. - [ ] Checked for duplicates ### Description In particular, this affects ATLAS OpenData produced with ROOT v6.34.04. ### Reproducer Trying to open and read one of the converted PHYSLITE files gives: ``` incompatible type name for field _0: ElementLink<DataVector<xAOD::Jet_v1>> vs. ElementLink<DataVector<xAOD::Jet_v1> > ``` Note the additional space in the on-disk field type name. ### ROOT version `master` and `v6-36-00-patches` ### Installation method from source ### Operating system Linux ### Additional context FYI @amete @Nowakus