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== New Features ==
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* There is a new config section for templates used by hg commands. It
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is called `[command-templates]`. Some existing config options have
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been deprecated in favor of config options in the new
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section. These are: `ui.logtemplate` to `command-templates.log`,
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`ui.graphnodetemplate` to `command-templates.graphnode`,
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`ui.mergemarkertemplate` to `command-templates.mergemarker`,
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`ui.pre-merge-tool-output-template` to
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`command-templates.pre-merge-tool-output`.
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* There is a new set of config options for the template used for the
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one-line commit summary displayed by various commands, such as `hg
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rebase`. The main one is `command-templates.oneline-summary`. That
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can be overridden per command with
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`command-templates.oneline-summary.<command>`, where `<command>`
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can be e.g. `rebase`. As part of this effort, the default format
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from `hg rebase` was reorganized a bit.
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* `hg strip`, from the strip extension, is now a core command, `hg
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debugstrip`. The extension remains for compatibility.
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* `hg diff` and `hg extdiff` now support `--from <rev>` and `--to <rev>`
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arguments as clearer alternatives to `-r <revs>`. `-r <revs>` has been
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deprecated.
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* The memory footprint per changeset during pull/unbundle
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operations has been further reduced.
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* There is a new internal merge tool called `internal:mergediff` (can
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be set as the value for the `merge` config in the `[ui]`
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section). It resolves merges the same was as `internal:merge` and
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`internal:merge3`, but it shows conflicts differently. Instead of
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showing 2 or 3 snapshots of the conflicting pieces of code, it
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shows one snapshot and a diff. This may be useful when at least one
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side of the conflict is similar to the base. The new marker style
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is also supported by "premerge" as
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`merge-tools.<tool>.premerge=keep-mergediff`.
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* External hooks are now called with `HGPLAIN=1` preset. This has the side
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effect of ignoring aliases, templates, revsetaliases, and a few other config
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options in any `hg` command spawned by the hook. The previous behavior
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can be restored by setting HGPLAINEXCEPT appropriately in the parent process.
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See `hg help environment` for the list of items, and how to set it.
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* The `branchmap` cache is updated more intelligently and can be
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significantly faster for repositories with many branches and changesets.
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== New Experimental Features ==
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* `experimental.single-head-per-branch:public-changes-only` can be used
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restrict the single head check to public revision. This is useful for
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overlay repository that have both a publishing and non-publishing view
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of the same storage.
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== Bug Fixes ==
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== Backwards Compatibility Changes ==
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* `--force-lock` and `--force-wlock` options on `hg debuglock` command are
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renamed to `--force-free-lock` and `--force-free-wlock` respectively.
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== Internal API Changes ==
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