misc: add djhtml files/notes (#69422)

.git-blame-ignore-revs

@@ -4,3 +4,5 @@
 f014f154640dc30fd27662ec6d93ae6e64125ea3
 # misc: apply pyupgrade (#69708)
 a107b7ef0e847882dcd6d5fc8c39e8feccc5705e
+# misc: apply djhtml (#69422)
+a5ec15a465840c454ed1d94547be821523fed473

.pre-commit-config.yaml

@@ -16,6 +16,11 @@ repos:
     hooks:
     - id: isort
       args: ['--profile', 'black', '--line-length', '110']
+- repo: https://github.com/rtts/djhtml
+  rev: 'v1.5.2'
+  hooks:
+    - id: djhtml
+      args: ['--tabwidth', '2']
 -   repo: https://git.entrouvert.org/pre-commit-debian.git
     rev: v0.1
     hooks:

README

@@ -188,6 +188,10 @@ pyupgrade is used to automatically upgrade syntax, using those parameters:
 
     pyupgrade --keep-percent-format --py37-plus
 
+djhtml is used to automatically indent html files, using those parameters:
+
+    djhtml --tabwidth 2
+
 There is .pre-commit-config.yaml to use pre-commit to automatically run these tools
 before commits. (execute `pre-commit install` to install the git hook.)