[4.2.x] Refs #34140 -- Added configurations to run blacken-docs linter and adjusted docs.

This adds:
- GitHub actions,
- tox configuration,
- pre-commit hook, and
- makefile rules
to run blacken-docs linter.

Co-authored-by: David Smith <smithdc@gmail.com>

Backport of 6015bab80e28aef2669f6fac53423aa65f70cb08 from main

1 files changed, 11 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index a9d4fc0a1a..48478ad51a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ skipsdist = true
 envlist =
     py3
     black
+    blacken-docs
     flake8
     docs
     isort
@@ -39,6 +40,16 @@ deps = black
 changedir = {toxinidir}
 commands = black --check --diff .
 
+[testenv:blacken-docs]
+basepython = python3
+usedevelop = false
+allowlist_externals =
+    make
+deps = blacken-docs
+changedir = docs
+commands =
+    make black
+
 [testenv:flake8]
 basepython = python3
 usedevelop = false