check documentation for dvc 2.9 release

[iesahin]

💣 Breaking Changes

• exp diff: Remove --old option. (exp diff: Remove --old option. dvc#6888)

🚀 New Features and Enhancements

• introduces exp init command
• render: image: make html less ugly (render: image: make html less ugly dvc#7075)
• plots: collect: provide callable for data resolution (plots: collect: provide callable for data resolution dvc#6832)
• live: Call webbrowser.open (live: Call webbrowser.open dvc#6913)
• scm: hint to autostage (scm: hint to autostage dvc#6985)
• exp show: Add --only-changed option (exp show: Add --only-changed option dvc#6867)

🐛 Bug Fixes

• exp: respect repo hardlink_lock config for the exp scm lock (exp: respect repo hardlink_lock config for the exp scm lock dvc#7030) -young
• dulwich: fallback to default SSH keys in asyncssh vendor (dulwich: fallback to default SSH keys in asyncssh vendor dvc#6983)
• plots: special chars handling for vega plots paths (plots: special chars handling for vega plots paths dvc#6900)
• params: Use ast.literal_eval for python params. (params: Use ast.literal_eval for python params. dvc#6954)
• push: fix http storage ignoring method setting (push: fix http storage ignoring method setting dvc#6981)
• hardlink: fallback to other link methods if "Function not implemented" is raised (hardlink: fallback to other link methods if "Function not implemented" is raised dvc#6963)
• argparse: dont override cmd (argparse: dont override cmd dvc#6958)

🔨 Maintenance

• build(deps): Bump scmrepo from 0.0.1 to 0.0.2 (build(deps): Bump scmrepo from 0.0.1 to 0.0.2 dvc#7055)
• packages: build binary pkgs with Python 3.9 (packages: build binary pkgs with Python 3.9 dvc#7016)
• dvc.scm: refactor exceptions (dvc.scm: refactor exceptions dvc#7017)
• build(deps): Bump adlfs from 2021.9.1 to 2021.10.0 (build(deps): Bump adlfs from 2021.9.1 to 2021.10.0 dvc#6734)
• build: bump sshfs from 2021.8.1 to 2021.11.2 (build: bump sshfs from 2021.8.1 to 2021.11.2 dvc#6999)
• build: bump pyinstaller from 4.6 to 4.7 (build: bump pyinstaller from 4.6 to 4.7 dvc#6960)
• dvc: get rid of path_info (dvc: get rid of path_info dvc#6946)

[jorgeorpinel]

Thanks @iesahin . Usually only new features may need matching docs updates.

p.s. are you taking this one? (I did the last one 😬)

[iesahin]

I can take this one, no problem, I also did the last one in a similar fashion. :)) I remember because everyone involved was notified :))

[jorgeorpinel]

Thanks!

p.s. by "last one" I meant 2.8.3. I usually check them without creating an issue here but create specific ones instead e.g. #3065. But you do you.

[iesahin]

Bugfix releases usually don't (and shouldn't) contain any documentation changes. Anyway, thank you. I can do this.

[iesahin]

I've read all of the PRs in the release. Great work @iterative/dvc Thank you 👏🏼 🎊

[jorgeorpinel]

Nice