obslog: use singular name "succnode" for each element of {succnodes}
The name that we pass for formatlist() is the name of each
element. After this patch, you'll write '{succnodes % "{succnode}"}'
instead of the confusing '{succnodes % "{succnodes}"}' (where the two
"succnodes" refer to different things.
Users can write templates that are compatible across this change by
using e.g. '{succnodes % "{if(succnode, succnode, succnodes)}"}'.
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.