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).
Doc is generated with sphinx.
You can generate the doc with:
```
make
```
# Tutorials
For updating the tutorials, you need to have the docgraph extension installed
(https://pypi.python.org/pypi/hg-docgraph).
Then run the test-topic-tutorial.t and test-tutorial.t to update the output if
needed.
You'll need the dot binary (likely installed by the graphviz package in your
package manager) in order to have graphviz graphs rendered in the html output.
Simply run make in the docs directory should takes care of the conversion of
the tutorial .t files into .rst files. Then sphinx should do the rest of the
jobs by rendering graphviz graphs.