filemerge: add non-interactive :merge-local and :merge-other There are two non-interactive internal merge tools, :other and :local, but they don't really merge, they just pick all changes from the local or other version of the file. In some situations, it is known that we want a merge and also know that all merge conflicts should be resolved in one direction. Although external merge tools can do this, sometimes it can be convenient to do so from within hg, without invoking a merge tool. These new :merge-local and :merge-other tools can do just that.