help: add additional information in the merge-tools section of config help The merge tool configuration in general has always been a confusing topic for user. We add mention of: - possible pre-existing configuration, - way to look at it, - the more detailed help topic about how merge-tools configuration works. This should help users find they way.

subrepo: use subrepo shortid method to generate subrepo diverged promptchoice We were always using only the first 12 characters of the subrepo revision id when generating the "subrepo diverged" promptchoice. This is not necessarily correct for non mercurial subrepos.

subrepo: add shortid() method to subrepo classes This method takes an "id" (e.g. a revision id) and returns a "short" version (e.g. a short revision id). This will be used on the next revision to fix a small bug in the way that the text on the promptchoice shown when a subrepo diverges is generated.

localrepo: call _dirstatestatus instead of duplicating logic

workingctx: call _dirstatestatus in status Rip out the call from workingctx.status to localrepo.status.

context: add private _dirstatestatus method This patch is a step forward in getting rid of needing to check 'parentworking' throughout the status method. Eventually, we will use the power of inheritance to do the correct thing when comparing the working directory with its parent. This method is mostly a copy from localrepo.status. The custom status method of workingctx will eventually be absorbed by the refactoring of localrepo.status to context.status but unfortunately we can't do it in one step.

committablectx: move status to workingctx This method was accidentally placed into the committablectx class. It contains logic for querying the dirstate so we move it to the correct class.

localrepo: factor out parentworking logic for comparing files We will temporarily call a private method of the context class while we are in the process of removing the need of having localrepo.status.

localrepo: improve dirstate.normal lookup by cacheing the function

localrepo: move symlink logic to workingctx