Normalize indentation

tox.ini

@@ -20,11 +20,11 @@ extras = testing
 
 [testenv:build-docs]
 extras =
-    docs
-    testing
+	docs
+	testing
 changedir = docs
 commands =
-    python -m sphinx . {toxinidir}/build/html
+	python -m sphinx . {toxinidir}/build/html
 
 [testenv:release]
 skip_install = True
@@ -42,4 +42,4 @@ commands =
 	python -c "import path; path.Path('dist').rmtree_p()"
 	python -m pep517.build .
 	python -m twine upload dist/*
-    python -m jaraco.tidelift.publish-release-notes
+	python -m jaraco.tidelift.publish-release-notes