graphlog: display nodes with more than 2 predecessors While nodes with more than 2 parents do not exist in revision graphs, they do appear when you transform them by removing subgraphs while trying to preserve ancestry links. This code was borrowed from Peter Arrenbrecht <peter.arrenbrecht@gmail.com> pbranch extension.

context: provide an efficient iterator for workingctx This avoids needing to call status or build a synthetic manifest.

merge with stable

merge with nicdumz