Fix broken tox.ini

tox.ini

@@ -40,7 +40,7 @@ commands =
 # other envs
 
 [testenv:mkvenv]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 commands = {envpython} scripts/link_pyqt.py --tox {envdir}
 envdir = {toxinidir}/.venv
 usedevelop = true
@@ -57,7 +57,7 @@ deps = {[testenv:mkvenv]deps}
 
 # Virtualenv with PyQt5 from PyPI
 [testenv:mkvenv-pypi]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 envdir = {toxinidir}/.venv
 commands = {envpython} -c ""
 usedevelop = true
@@ -67,7 +67,7 @@ deps =
 
 [testenv:misc]
 ignore_errors = true
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 # For global .gitignore files
 passenv = HOME
 deps =
@@ -78,7 +78,7 @@ commands =
     {envpython} scripts/dev/misc_checks.py userscripts
 
 [testenv:vulture]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/misc/requirements/requirements-vulture.txt
@@ -88,7 +88,7 @@ commands =
     {envpython} scripts/dev/run_vulture.py
 
 [testenv:vulture-pyqtlink]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/misc/requirements/requirements-vulture.txt
@@ -98,7 +98,7 @@ commands =
     {[testenv:vulture]commands}
 
 [testenv:pylint]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 ignore_errors = true
 passenv =
 deps =
@@ -111,7 +111,7 @@ commands =
     {envpython} scripts/dev/run_pylint_on_tests.py {toxinidir} --output-format=colorized --reports=no {posargs}
 
 [testenv:pylint-pyqtlink]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 ignore_errors = true
 passenv =
 deps =
@@ -124,7 +124,7 @@ commands =
     {envpython} scripts/dev/run_pylint_on_tests.py {toxinidir} --output-format=colorized --reports=no {posargs}
 
 [testenv:pylint-master]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv = {[testenv:pylint]passenv}
 deps =
     -r{toxinidir}/requirements.txt
@@ -136,7 +136,7 @@ commands =
     {envpython} scripts/dev/run_pylint_on_tests.py --output-format=colorized --reports=no {posargs}
 
 [testenv:flake8]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv =
 deps =
     -r{toxinidir}/requirements.txt
@@ -145,7 +145,7 @@ commands =
     {envpython} -m flake8 {posargs:qutebrowser tests scripts}
 
 [testenv:pyroma]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv =
 deps =
     -r{toxinidir}/misc/requirements/requirements-pyroma.txt
@@ -153,7 +153,7 @@ commands =
     {envdir}/bin/pyroma .
 
 [testenv:check-manifest]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv =
 deps =
      -r{toxinidir}/misc/requirements/requirements-check-manifest.txt
@@ -161,7 +161,7 @@ commands =
     {envdir}/bin/check-manifest --ignore 'qutebrowser/git-commit-id,qutebrowser/html/doc,qutebrowser/html/doc/*,*/__pycache__'
 
 [testenv:docs]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 whitelist_externals = git
 passenv = TRAVIS TRAVIS_PULL_REQUEST
 deps =
@@ -173,7 +173,7 @@ commands =
     {envpython} scripts/asciidoc2html.py {posargs}
 
 [testenv:pyinstaller]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv = APPDATA HOME
 deps =
     -r{toxinidir}/requirements.txt
@@ -192,7 +192,7 @@ changedir = {toxinidir}/qutebrowser/javascript
 commands = eslint --color --report-unused-disable-directives .
 
 [testenv:mypy]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv = TERM
 deps =
     -r{toxinidir}/requirements.txt
@@ -203,7 +203,7 @@ commands =
     {envpython} -m mypy qutebrowser {posargs}
 
 [testenv:sphinx]
-basepython = {env:PYTHON:python3.8}
+basepython = {env:PYTHON:python3}
 passenv =
 usedevelop = true
 deps =