[TDF] Fix tables in user guide
[TDF] Fix tables in user guide

Markdown tables seem to not like line breaks inside a cell.
Clang-format, on the other hand, did not like our very long lines,
breaking the docs.

bbockelm/root,bbockelm/root,agarciamontoro/root,zzxuanyuan/root,agarciamontoro/root,zzxuanyuan/root,BerserkerTroll/root,simonpf/root,davidlt/root,mhuwiler/rootauto,beniz/root,simonpf/root,bbockelm/root,simonpf/root,agarciamontoro/root,zzxuanyuan/root,BerserkerTroll/root,root-mirror/root,davidlt/root,karies/root,zzxuanyuan/root,karies/root,simonpf/root,karies/root,root-mirror/root,mhuwiler/rootauto,olifre/root,mhuwiler/rootauto,root-mirror/root,olifre/root,BerserkerTroll/root,BerserkerTroll/root,zzxuanyuan/root,zzxuanyuan/root,simonpf/root,bbockelm/root,beniz/root,simonpf/root,agarciamontoro/root,karies/root,olifre/root,agarciamontoro/root,simonpf/root,BerserkerTroll/root,davidlt/root,root-mirror/root,beniz/root,davidlt/root,BerserkerTroll/root,olifre/root,zzxuanyuan/root,davidlt/root,karies/root,zzxuanyuan/root,davidlt/root,zzxuanyuan/root,karies/root,beniz/root,olifre/root,bbockelm/root,beniz/root,karies/root,root-mirror/root,agarciamontoro/root,zzxuanyuan/root,BerserkerTroll/root,mhuwiler/rootauto,davidlt/root,mhuwiler/rootauto,davidlt/root,olifre/root,karies/root,olifre/root,davidlt/root,mhuwiler/rootauto,karies/root,mhuwiler/rootauto,beniz/root,root-mirror/root,root-mirror/root,davidlt/root,simonpf/root,mhuwiler/rootauto,agarciamontoro/root,bbockelm/root,root-mirror/root,bbockelm/root,beniz/root,simonpf/root,root-mirror/root,root-mirror/root,olifre/root,zzxuanyuan/root,olifre/root,BerserkerTroll/root,mhuwiler/rootauto,olifre/root,karies/root,bbockelm/root,agarciamontoro/root,mhuwiler/rootauto,BerserkerTroll/root,beniz/root,bbockelm/root,olifre/root,bbockelm/root,simonpf/root,BerserkerTroll/root,beniz/root,karies/root,simonpf/root,beniz/root,mhuwiler/rootauto,bbockelm/root,agarciamontoro/root,BerserkerTroll/root,zzxuanyuan/root,davidlt/root,beniz/root,agarciamontoro/root,root-mirror/root,agarciamontoro/root