help: define list of keywords that should be excluded from non-verbose output This list will be reused by the other deprecated/experimental handling.

merge with stable

unbundle: cleanly abort on unknown bundle2 feature The exception wasn't caught and resulted in a traceback.

phases: return zero for no-op operations (issue4751) (BC) It is rather unhelpful to return 1 if there were no changes because the request matches the current state of phases. So we just undo that.

help: add config.troubleshooting section at the top

dispatch: don't stack trace on commands like `hg .log` This used to stack trace because it raised a util.Abort which wasn't handled in this block. We now handle it. Additionally, we error out earlier instead of plodding on and showing the "log" entry of the plain `hg help` output.