Add pyproject-fmt pre-commit hook

Author: adamchainz

.pre-commit-config.yaml

@@ -13,6 +13,10 @@ repos:
   - id: check-toml
   - id: end-of-file-fixer
   - id: trailing-whitespace
+- repo: https://github.com/tox-dev/pyproject-fmt
+  rev: 0.9.1
+  hooks:
+  - id: pyproject-fmt
 - repo: https://github.com/asottile/setup-cfg-fmt
   rev: v2.2.0
   hooks:

pyproject.toml

@@ -1,10 +1,18 @@
 [build-system]
-requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
+requires = [
+  "setuptools",
+]
 
 [tool.black]
 target-version = ['py37']
 
+[tool.pytest.ini_options]
+addopts = """\
+    --strict-config
+    --strict-markers
+    """
+
 [tool.mypy]
 mypy_path = "src/"
 namespace_packages = false
@@ -15,9 +23,3 @@ warn_unreachable = true
 [[tool.mypy.overrides]]
 module = "tests.*"
 allow_untyped_defs = true
-
-[tool.pytest.ini_options]
-addopts = """\
-    --strict-config
-    --strict-markers
-    """