v0.17.0

### Breaking changes

* The default template aliases were replaced as follows:
  * `builtin_op_log_root(op_id: OperationId)` ->
    `format_root_operation(root: Operation)`
  * `builtin_log_root(change_id: ChangeId, commit_id: CommitId)` ->
    `format_root_commit(root: Commit)`
  * `builtin_change_id_with_hidden_and_divergent_info` ->
    `format_short_change_id_with_hidden_and_divergent_info(commit: Commit)`

* The `--revision` option of `jj rebase` is renamed to `--revisions`. The short
  alias `-r` is still supported.

### New features

* The list of conflicted paths is printed whenever the working copy changes.
  This can be disabled with the `--quiet` option.

* Commit objects in templates now have a `mine() -> Boolean` method analog to
  the same function in revsets. It evaluates to true if the email of the commit
  author matches the current `user.email`.

* Commit objects in templates now have a `contained_in(revset: String) ->
  Boolean` method.

* Operation objects in templates now have a `snapshot() -> Boolean` method that
  evaluates to true if the operation was a snapshot created by a non-mutating
  command (e.g. `jj log`).

* Revsets and templates now support single-quoted raw string literals.

* A new config option `ui.always-allow-large-revsets` has been added to
  allow large revsets expressions in some commands, without the `all:` prefix.

* A new config option `ui.allow-filesets` has been added to enable ["fileset"
  expressions](docs/filesets.md). Note that filesets are currently experimental,
  but will be enabled by default in a future release.

* A new global flag `--ignore-immutable` lets you rewrite immutable commits.

* New command `jj parallelize` that rebases a set of revisions into siblings.

* `jj status` now supports filtering by paths. For example, `jj status .` will
  only list changed files that are descendants of the current directory.

* `jj prev` and `jj next` now work when the working copy revision is a merge.

* `jj squash` now accepts a `--use-destination-message/-u` option that uses the
  description of the destination for the new squashed revision and discards the
  descriptions of the source revisions.

* You can check whether Watchman fsmonitor is enabled or installed with the new
  `jj debug watchman status` command.

* `jj rebase` now accepts revsets resolving to multiple revisions with the
   `--revisions`/`-r` option.

* `jj rebase -r` now accepts `--insert-after` and `--insert-before` options to
  customize the location of the rebased revisions.

### Fixed bugs

* Revsets now support `\`-escapes in string literal.

* The builtin diff editor now allows empty files to be selected during
  `jj split`.

* Fixed a bug with `jj split` introduced in 0.16.0 that caused it to incorrectly
  rebase the children of the revision being split if they had other parents
  (i.e. if the child was a merge).

* The `snapshot.max-new-file-size` option can now handle raw integer literals,
  interpreted as a number of bytes, where previously it could only handle string
  literals. This means that `snapshot.max-new-file-size="1"` and
  `snapshot.max-new-file-size=1` are now equivalent.

* `jj squash <path>` is now a no-op if the path argument didn't match any paths
  (it used to create new commits with bumped timestamp).
  [#3334](https://github.com/martinvonz/jj/issues/3334)

### Contributors

Thanks to the people who made this release happen!

* Anton Älgmyr (@algmyr)
* Anton Bulakh (@necauqua)
* Austin Seipp (@thoughtpolice)
* Benjamin Tan (@bnjmnt4n)
* Cretezy (@Cretezy)
* Daniel Ploch (@torquestomp)
* Evan Mesterhazy (@emesterhazy)
* Ilya Grigoriev (@ilyagr)
* Martin von Zweigbergk (@martinvonz)
* Noah Mayr (@noahmayr)
* Jeremy O'Brien (@neutralinsomniac)
* Jonathan Lorimer (@JonathanLorimer)
* Philip Metzger (@PhilipMetzger)
* Poliorcetics (@poliorcetics)
* Rowan Walsh (@rowan-walsh)
* Scott Olson (@solson)
* Théo Daron (@Kaporos)
* Yuya Nishihara (@yuja)