[py] Cleanup tox config (#15833)

Author: cgoldberg

py/tox.ini

@@ -1,43 +1,50 @@
 [tox]
-envlist = docs, flake8, isort, validate-pyproject
+envlist =
+  validate
+  linting
 
-[testenv:validate-pyproject]
+
+[testenv:validate]
 skip_install = true
 deps =
-  validate-pyproject==0.24.1
-  packaging==25.0
+    validate-pyproject==0.24.1
+    packaging==25.0
 commands =
-  validate-pyproject ./pyproject.toml
+    validate-pyproject ./pyproject.toml
+
 
 [testenv:docs]
 skip_install = true
 deps =
-  -r {toxinidir}/docs/requirements.txt
-  -r {toxinidir}/requirements.txt
+    -r {toxinidir}/docs/requirements.txt
+    -r {toxinidir}/requirements.txt
 commands =
-  ; generate `docs/source/api.rst` with module listing
-  {envpython} ./generate_api_module_listing.py
-  ; regenerate autodoc stub pages
-  sphinx-autogen docs/source/api.rst
-  ; build api docs
-  sphinx-build -b html -d ../build/docs/doctrees docs/source ../build/docs/api/py {posargs}
+    # generate `docs/source/api.rst` with module listing
+    {envpython} ./generate_api_module_listing.py
+    # regenerate autodoc stub pages
+    sphinx-autogen docs/source/api.rst
+    # build api docs
+    sphinx-build -b html -d ../build/docs/doctrees docs/source ../build/docs/api/py {posargs}
 setenv =
   PYTHONPATH = {toxinidir}/.
 
+
 [testenv:mypy]
 skip_install = true
 deps =
-  mypy==1.15.0
-  lxml==5.3.2
-  types-urllib3==1.26.25
-  types-certifi==2021.10.8.3
-  trio-typing==0.10.0
-commands = mypy --install-types {posargs}
+    mypy==1.15.0
+    lxml==5.3.2
+    types-urllib3==1.26.25
+    types-certifi==2021.10.8.3
+    trio-typing==0.10.0
+commands =
+    mypy --install-types {posargs}
+
 
 [testenv:linting]
 skip_install = true
 deps =
-  ruff==0.11.12
+    ruff==0.11.12
 commands =
-  ruff check --fix --show-fixes --exit-non-zero-on-fix .
-  ruff format --exit-non-zero-on-format .
+    ruff check --fix --show-fixes --exit-non-zero-on-fix .
+    ruff format --exit-non-zero-on-format .