chore(deps): bump tox from 4.63.0 to 4.64.3 in /.github/unit-tests

[dependabot]

Bumps tox from 4.63.0 to 4.64.3.

Release notes

Sourced from tox's releases.

v4.64.3

What's Changed

• Create change_dir before running the external package build command by @​Rodrigo-Palma in tox-dev/tox#4095
• Keep every file entry of a set_env list of tables by @​Rodrigo-Palma in tox-dev/tox#4094

New Contributors

• @​Rodrigo-Palma made their first contribution in tox-dev/tox#4095

Full Changelog: tox-dev/tox@4.64.2...4.64.3

v4.64.2

What's Changed

• 🐛 fix(run): keep .venv redirect off for a .venv env by @​gaborbernat in tox-dev/tox#4091
• 🐛 fix(run): point .venv at a deliberate dev env by @​gaborbernat in tox-dev/tox#4092

Full Changelog: tox-dev/tox@4.64.1...4.64.2

v4.64.1

What's Changed

• 🐛 fix(config): apply overrides to sections the file lacks by @​gaborbernat in tox-dev/tox#4089

Full Changelog: tox-dev/tox@4.64.0...4.64.1

v4.64.0

What's Changed

• docs: fix the TOML string substitution example by @​agammann in tox-dev/tox#4081
• fix: ignore broken sphinx-llm release by @​gaborbernat in tox-dev/tox#4083
• chore(type): narrow _emit_conf keys for ty 0.0.83 by @​MohammedAlkindi in tox-dev/tox#4084
• fix(config): read the user config file as UTF-8 by @​MohammedAlkindi in tox-dev/tox#4086
• 🐛 fix(ci): diff coverage against the PR base by @​gaborbernat in tox-dev/tox#4088
• ✨ feat(config): write a PEP 832 .venv redirect file by @​gaborbernat in tox-dev/tox#4013

New Contributors

• @​agammann made their first contribution in tox-dev/tox#4081

Full Changelog: tox-dev/tox@4.63.0...4.64.0

Changelog

Sourced from tox's changelog.

Bug fixes - 4.64.3

• A set_env written as a list of tables in TOML now keeps every file entry and honors the order of the entries, so merging one environment's set_env into another no longer drops the environment file it referenced (:issue:4093) - by :user:Rodrigo-Palma.

  • Each { file = "..." } entry is read; previously only the last one survived, because the entries were merged into a single table first and a table cannot hold the key twice.
  • A variable set after a file entry wins over the value the file provides, matching the file| form in INI; previously a repeated variable was pulled back to its first position, letting the file override it.
  • A later entry that sets a variable without a marker clears the marker an earlier entry gave it, again matching the INI form. (:issue:4093)

• Create the package build environment change_dir directory before running the build commands, as the documentation already promises. (:issue:4095)

---

v4.64.2 (2026-09-24)

---

Bug fixes - 4.64.2

• A tox environment with env_dir = "{tox_root}/.venv" no longer crashes with FileExistsError after another environment ran (:issue:4090) - by :user:gaborbernat.

  • With :ref:venv_redirect unset, the new default, tox writes the redirect file unless a tox environment lives at .venv; with true, tox fails the run with an error naming that environment.
  • tox deletes a redirect file it wrote where an environment should live, and fails the environment with an error naming any other file there. (:issue:4091)

• The :PEP:832 .venv redirect file now names a deliberate development environment - by :user:gaborbernat.

  • tox picks :ref:venv_redirect_env, else an environment named dev, else the first that installs the project in development mode, and writes nothing without one, so a project that uses tox for tests alone gets no file.
  • tox devenv points the redirect at the environment it creates, and later runs leave it in place.
  • tox tells virtualenv to write no redirect file of its own beside the environments it builds. (:issue:4092)

---

v4.64.1 (2026-09-24)

---

Bug fixes - 4.64.1

• Apply -x/--override and TOX_OVERRIDE values that target a section the configuration file does not define, such as tox.skip_missing_interpreters on a tox.ini without a [tox] section, instead of dropping them - by :user:gaborbernat. (:issue:4089)

... (truncated)

Commits

• f46060e release 4.64.3
• ca35bdb Keep every file entry of a set_env list of tables (#4094)
• 31ed8d9 Create change_dir before running the external package build command (#4095)
• 9cd0f4e release 4.64.2
• c2b87d2 🐛 fix(run): point .venv at a deliberate dev env (#4092)
• a8fa8cc 🐛 fix(run): keep .venv redirect off for a .venv env (#4091)
• e40e8e6 release 4.64.1
• eacd4e9 🐛 fix(config): apply overrides to sections the file lacks (#4089)
• fff62f6 release 4.64.0
• 5c56ce0 ✨ feat(config): write a PEP 832 .venv redirect file (#4013)
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