Explain what you would like to see improved and how.

Info() logs should not go to stderr but stdout instead.

For example hadd now by default prints messages starting with Info in <hadd>: but they go into stderr which is unintuitive and confusing.

ROOT version

ROOT 6.36.02 from LCG_108 using GCC 15.1.0.

Installation method

LCG_108

Operating system

AlmaLinux 9

Additional context

No response