tests: add more verification of output to divergence tests It's not obvious what the obsmarkers should look like in these tests and adding them highlights a bug that happens when commit we create to resolve the divergence doesn't get created because it would be empty. I also added a few graphlog calls to check that the divergence-resolution commit is in the right place (has right parentage).

mkdir -p html

cp index.html html/
cp *.css html/
cp *.js html/
cp -R img html/
cp -R graphviz-images/ html/

netlify deploy