build: more pre-commit checks

I tried `check-hooks-apply`, but it complained that check-symlinks
doesn't apply because I have no symlinks.  That's dumb. I want to
protect against future additions of bad symlinks.

I tried `rst-backticks`, but it complained about every single-backticked
thing in my docs.  Sphinx allows single backticks, they just mean
something different than code.

Author: nedbat

.pre-commit-config.yaml

@@ -14,3 +14,18 @@ repos:
         exclude: "(status\\.json|\\.min\\.js)$"
       - id: trailing-whitespace
         exclude: "stress_phystoken|\\.py,cover$"
+
+  - repo: https://github.com/pre-commit/pygrep-hooks
+    rev: v1.10.0
+    hooks:
+    - id: rst-directive-colons
+    - id: rst-inline-touching-normal
+
+  - repo: https://github.com/sphinx-contrib/sphinx-lint
+    rev: v1.0.0
+    hooks:
+      - id: sphinx-lint
+
+  - repo: meta
+    hooks:
+      - id: check-useless-excludes