[TMVA] clang-format of Envelope
[TMVA] clang-format of Envelope

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