fix atlas style

[couet]

fix https://root-forum.cern.ch/t/fixing-tstyle-default-settings-if-name-atlas/41038

[phsft-bot]

Starting build on ROOT-debian10-i386/cxx14, ROOT-performance-centos7-multicore/default, ROOT-fedora30/cxx14, ROOT-fedora31/noimt, ROOT-ubuntu16/nortcxxmod, mac1014/python3, mac1015/cxx17, windows10/cxx14
How to customize builds

[phsft-bot]

Build failed on ROOT-fedora31/noimt.
Running on root-fedora-31-2.cern.ch:/home/sftnight/build/workspace/root-pullrequests-build
See cdash.
See console output.

Errors:

• [2020-09-02T08:43:31.184Z] CMake Error at /home/sftnight/build/workspace/root-pullrequests-build/rootspi/jenkins/root-build.cmake:982 (message):

[phsft-bot]

Build failed on windows10/cxx14.
Running on null:C:\build\workspace\root-pullrequests-build
See cdash.
See console output.

Errors:

• [2020-09-02T08:47:52.534Z] CMake Error at C:/build/workspace/root-pullrequests-build/rootspi/jenkins/root-build.cmake:982 (message):

[phsft-bot]

Build failed on ROOT-performance-centos7-multicore/default.
Running on olhswep22.cern.ch:/data/sftnight/workspace/root-pullrequests-build
See cdash.
See console output.

Errors:

• [2020-09-02T09:32:17.843Z] CMake Error at /data/sftnight/workspace/root-pullrequests-build/rootspi/jenkins/root-build.cmake:982 (message):