run-tests: alternative way of handling \r on Windows After f71d60da58fb all \r was stripped from output on Windows, and the places where a \r explicitly was expected it was accepted that it was missing. Ugly hack. Instead we now accept that an extra \r might appear at the end of lines on Windows. That is more to the point and less ugly.

obsolete: flip `obstore.successors` and `obsolete.precursors` People were confused by the fact `obstore.precursors` contained marker allowing to find "precursors" and vice-versa. This changeset changes their meaning to: - precursors[x] -> set(markers on precursors edges of x) - successors[x] -> set(markers on successors edges of x) Some documentation is added to clarify the situation.

obsolete: add example of marker usage in the documentation Recent discussion with Augie Fackler pointed the lack of such example in the documentation.